Can you?

>>685445066
https://www.wolframalpha.com/
/thread

Everyone below this post got trolled.

>>685445066
not doing your fucking homework

>>685445066
Can u not

>>685445066
Tell me one way your equation relates to reality

log(12*sin(32))

>>685445237
ehm, all jobs that count nowadays are math-heavy?
>enjoy flipping burgers or asking "what size would you like those pants in, sir?" for ur whole life

-16

>>685445149
https://www.wolframalpha.com//thread

page not found

-13

-14

-15

>>685445066
-12 biotch

>>685445066
Dis gon be easy nigga
4+3-(5*(2^2))+2-(((4^(1/2))-3)^2)
9-(5*4)-((2-3)^2)
9-20-((-1)^2)
-11-1
-12

-14

>>685445659
4+3=7, not 9.

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>>685445066

“P or not-P, that is the question”

>>685446023
I collected the other loose +2 in the 9

>>685445869
(-1)^2 is +1

>>685445659
This

-12. Next.

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It's -12

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Next round. Getting harder.

>>685447763
I always sucked at the functions, can someone maybe explain ?

it's -12

>>685447763
Well, given the starting point, we can find all the values for ascending odd inputs starting from 3:
f(3) = 5
f(x) = f(x-2) + 1

f(5) = f(5-2) + 1 = f(3) + 1 = 5 + 1 = 6
f(7) = f(7-2) + 1 = f(5) + 1 = 6 + 1 = 7
f(9) = f(9-2) + 1 = f(7) + 1 = 7 + 1 = 8
f(11) = f(11-2) + 1 = f(9) + 1 = 8 + 1 = 9

So are we allowed to assume that the function is continuous and linear? If so:
f(x) = x/2 + 7/2 = (x + 7)/2

And hence:
f(4) = (4 + 7)/2 = 11/2 = 5.5

4 + 3 - 5 * 2^2 + 2 - (4^.5 - 3)^2
4 + 3 - 5 * 2^2 + 2 - (2 - 3)^2
4 + 3 - 5 * 2^2 + 2 - (-1)^2
4 + 3 - 5 * 4 + 2 - 1
4 + 3 - 20 + 2 - 1 = -12
ez

its -12 in my brain. that will do.

7-20+2+1 = -10

>>685445066
PEDMAS
4+3-5*2^2+2-(sqrt(4)-3)^2=
4+3-5*2^2+2-(2-3)^2=
4+3-5*2^2+2-1^2=
4+3-5*4+2-1=
4+3-20+2-1=-14

>>685449399
-(-1)^2 = -1 => 7-20+2-1 = -12

>>685449666
Learn to arithmetic you stupid cunt.
4+3-20+2-1=
7+1-20=-12

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I bet you can't this time.

>>685450361
Full image would help bro

- 12

>>685445066
-10

-(-1) means it has to be added, not subtracted. Many seem to miss that part.

>>685445275
0.8033909538

you literally just told me what to put into my calculator. Gj man that was a fucken tuff one you are rain man

>>685451338
a square is always positive. Many seem to miss that part.

>>685451338
-(-1)^2=-1

>>685451260
squaring the -1 makes it positive, which you missed

>>685448770
thats a stupid way someone who didnt learn american solutions please explain

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Glad other people are getting -12, the rest are autistic

>>685445066
7-20+2-1= -12

Everybody not knowing that is an insanely stupid wanker.

>>685451557
and the negative sign before the brackets makes it negative again.


Which you missed

am i good at math if i can do this in my head?

>>685445066
-12

-12

>>685451749
FUKEN SCHOOOOLED SON

>>685445066
>4+3-5*2^2+2-(2-3)^2
>4+3-5*4+2-1
>4+3-20+4-1
>11-20
>-10

>>685451815
It's a pretty easy question, anyone who's moderately intelligent could do it in their head.
Unfortunately there's a lot of people who probably couldn't do it in their head.

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>>685451730

Mate, I'm glad you got the right answer, but root of 4 = 2, thus 2-3 = -1, and -1^2 = 1

>just

>>685445449
Lel

>>685445237
Oh, the poor fool.

>>685451967
so youre saying im a math god

>>685451979
yeah thanks, i realised that would have been easier shortly after I finished but oh well

>>685451519
It can be explained like this:
>Americans

>>685451893
you're wrong, you fucked it up completely on the third line

-12 is the right answer.

>>685452177
you are right

>>685448770
That's some assumption you're making there. Can you prove that's the case for all recursive functions of this type?

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>>685452085
He's saying you're merely average, wank stain

>>685451979
-1^2 = -1
I think you mean (-1)^2 = 1

I'm a fan of these maths question threads, would anyone be interested in more if I made them every now and again
maybe even other topics than maths

>>685445066
-12

>>685452361
Yeah we all love doing basic math and feeling superior because most people are shyte at it.

>>685452314
haha look at the filthy cunt who couldnt solve it in his head.

I am your god now math peasants bow to my almighty powers. I am rain man without the retard

>>685452361
>>685452435
pretty much this lmao

>>685452435
Right I'm gonna make one now. Hope some of you fags know how to integrate

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Not this time /b/.

>>685447763
The function increases by 1 for every 2 x
Assuming it's linear, it increases by 1/2 for every 1 x
f(3) =5
=>
f(4) =5.5
Easy.
Neeeext

>>685452245
>That's some assumption you're making there. Can you prove that's the case for all recursive functions of this type?


Not that guy. Also not sure how to prove it, but fairly certain that the only solutions to f(x) = f(x+a)+b are the linear functions with the appropriate slope.

>>685452859
can you prove this and post pic. Havent done functions in years

>>685452740
28+21+12= 61
Next

>>685452245
>>685453061

Sorry, was wrong.

>>685452740


61

>>685453104
What i did was read the info and comprehend it really.
It's more an issue of understanding than proving.
But i'll try to explain
f(x) = f(x-2) +1
This means that increasing x by 2, increases f(x) by 1
f(x)-f(x-2)=1
In other words
f(x+2)-f(x)=1
If x=3,
f(5)-f(3)=1
Divide both sides by two
(f(5)-f(3))/2=1/2
Realize the first part is really f(4)-f(3)
f(4)-f(3)=1/2
f(4)=f(3)+1/2
Insert value for f(3)
f(4)=5+1/2
You can take it from here
Fuck i accidentally proved it.
Oh well

>>685454272
>(f(5)-f(3))/2=1/2
>Realize the first part is really f(4)-f(3)

That's where you're wrong. Or where your implicit assumption of a linear function is hidden.

>>685451730
>>685451979
EVERYONE IS FORGETTING THE FACT THAT THE SQUARE ROOT OF 4 IS +2, OR -2. SO THE QUESTION HAS MULTIPLE ANSWERS!!!!!!!!!

>>685454272
It just clicked
f(x)=f(x-2)+1

this means that increasing x by 2, increases f(x) by 1

thanks mate

>>685445066
I did just now
http://frtyd.com/go/gQ0i_bAaEj/Pizzapls

>>685455264
This is true, made the mistake myself

>>685454613
yes but he can see it is linear because if x is increased by 2 f(x) is increased by one.

>>685455264
>THE SQUARE ROOT OF 4 IS +2

No, you don't define the square root like that.

>>685455264
hes an absolute madman!
a math genius right here lads and gents

>>685445066
-92

>>685455264
but you square it dipshit

>>685455264
Nope, √4 = only 2

How do I get gud at math?
I mean math, not calculating things.

I've basically forgotten all of my A-Level knowledge from High school and I wanna go to University.
How do you learn math in an effective, fast way?
Getting the concepts and mechanism down, abstract concepts in a way you can understand it, ...

Maybe there is some math wizard (Math graduate) in here.

>>685454613
>that's where you're wrong
My first post clearly states
>assuming that the function is linear
You stupid cunt

>>685455779
>yes but he can see it is linear because if x is increased by 2 f(x) is increased by one.

That doesn't make sense.
IF you assume a linear function, the answer is correct. I can give you a lot of other functions that fulfill the given criteria which are not correct.

For example, take a function periodic in 2 and add it to your linear solution.
f(x)=1/2*x + 3.5
is your solution
g(x)=1/2*x + 3.5 + sin(pi*(x-1) / 2)
is another one.

>>685456284
khanacademy

>>685456284
salman khan is math wizard you seek

>>685456528
well then the question is fucking impossible without being specified

>>685456394
>My first post clearly states
>>assuming that the function is linear
>You stupid cunt

> My first post
Not the one I replied to. Meh.

>>685456284
I'd recommend going to the AQA or OCR or whatever website and downloading a bunch of past papers and mark schemes. It'll all start coming back to you quickly

>>685456271
Nope. (-2)*(-2)=4, so √4 can equal -2

>>685456653
>well then the question is fucking impossible without being specified
Yes. So what?

>>685445066
I get 1 / (1 + 2 + 3 + 4 + ... + N + ...), but I can't seem to simplify it any further. Any help?

>>685445066
-12

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>>685455264
How about this?

>>685445066
>>685445066
-14 easy.

>>685456759
>Nope. (-2)*(-2)=4
Yes
>so √4 can equal -2
Does not follow.

The reasonable definition of sqrt(y) is "the positive solution of x*x=y" for positive reals y.

>>685445066
It's negative twelve. What do I win?

>>685456759
u wot m8?

>>685456784
so quit being a fag its clearly ment to be linear

you dont tell a year 3 learning what a square root is about how - numbers = can equal positive.

Did half of you faggots even pass High School? The square root of a number only gives the positive value per definition

>>685457038
lmao ffs cunt

>>685457151
is this a troll in a maths thread

>>685456759
In my book there's a difference between √x and x^1/2 - √x is the value of x^1/2 with a branch cut taken from -infinity to 0. So (4)^1/2 is multivalued, but √4 is not.

>>685455264
>Being this retarded
>Unable to do basic algebra
If the equation gives you the square root you assume it's positive unless stated otherwise.
If you introduce the root into the equation, then you have to account for both.

>>685457089
Where did you specify "only for 3rd graders"?
You under8 b&?

>>685457151
Root of a number is defined by any number times itself = said number you are trying to find root of.

-2x-2 = 4 2x2= 4

Square root of four is
-2 and 2

-12

>>685457433
>Root of a number is defined by any number times itself = said number you are trying to find root of.

No, it's not. It's defined to be positive.

>>685457362
well your book is retarded because by definition

√x = x^1/2

meaning there is no difference.

>>685457433
From wikipedia: "Every non-negative real number a has a unique non-negative square root, called the principal square root, which is denoted by √a"

>>685452032
Yep. He probably doesn't know that math is the backbone of science or about every fucking thing we do because he's a bus boy

>>685445656

This.

-12 or 14

-12.

>>685445066
Yes, but I'm too lazy. just PEMDAS that bitch

>>685457396
jesus christ youre that kid who aced math but not a social life.

The question is obviously not at the level in which you answered wether it was specified or not quit being a faggot trying to show off your highschool math skills you poofy little cunt

>>685457789
>PEMDAS
>Doesn't have a letter for "Square root"
WHERE IS YOUR GOD NOW

>>685457524
are you ok? had ur pills today

>>685445066
this is so fucking easy. even a 12 year old could figure this out how old are you underraged faggot?

-12

>>685457636
YES IT IS DENOTED BY THAT

but you know what is ALSO denoted by that

the negative root
genius.

>>685445066
-24 + 6√4

Everyone happy now?

isnt it -11?

>>685445659
I m astounded by the fact that we're even discussing this, are /b/tards really this fucking stupid? (not refferring to your post, just in general and yes of course that's the answer)

>>685458224
lmao gj bro you can use surds.

This is a pedmas question

>>685458266
-11-1

>>685458208
Except it isn't, because that's -√a

I'll have you know I graduated magna cum loudly from Harvard 5 years ago and this is the sort of shit that would get you laughed at there. Maybe if you weren't so fucking stupid you'd understand.

>>685458371
right, i am dum and didnt notice the - before the brackets, yeye

-12 4 sure boys

>>685452173
/thread
litterally this, an 11 y o french kid can figure it out without even having to think. what is wrong with their country?

Most condensed form.
1±13

>>685458600
Show me how you get 14.

I get -24 ± 12.

>>685452468
Well, you're 1/2 right, my lord

4+3-5*4+2-(2-3)^2

4+3-20+2-(-1)^2

4+3-20+2-1

9 - 21

-12

>>685457365
Are you retarded? There is no assuming. Math has specific values.

>>685458443
So harvard never learnt + - signs

√4 = +-2

-√4 = + - 2

essentially you times the answer by a negative and flip the answers. Glad you graduated in taking cum at harvard maybe nextime focus on math and not jizz

>>685452548
Segregation, not integration

>>685445066
>order of operations
>math

Funfact: Americans are learning the math in college we already learn in germany in high school, but we cover it even there more deeply.
Burgers have in their 2nd year college the same level of math we had in grade 11. GG education

>(except pure math programs)

>>685458911
lel dude, i wish i grew up in germany (would have left by now) ausfag here, school system not as bad as US but is getting there rip

>>685451519
europe, australia, america, russia

square root of 4 = +-2

>>685445066
-12

>>685445066
-180

-12 If I'm not mistaken

>>685458911
fun fact: your country is filled with rapist muslims who will soon shroud all your women and kill all the infidels

>>685459183
ahem* ahem** /thread

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>>685459183

>>685457956
My God? He's right here:
>>685452468

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Let's see how clever you really are /b/.

Added constraint of boundary conditions of y=y'=1 at x=0.

√4 is only equal to a single value, which is 2. However, when you construct an algebraic expression, like "4=x^2", then x has two different solutions, which are 2 and -2. These values of x are not equal, otherwise any number would then be equal to it's negative counterpart, which would break arithmetic. For an example; 4-3=1. But 4 would then technically be equal to √16, which is then equal to -4. This would mean that 4-3=-7=1. But the algebraic expression "x=√16 -3 would have two solutions, being -7 and 1.

Is it really so hard to understand?

Its 9

ain't doing your homework op

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>>685459183

>>685459483
ok i am wrong sorry cumman

>>685458911
That's only true for the poorest of American schools for students who take the "normal" ciriculum, but at my high school most students were in the "advanced" courses and we learned college level calc 2 in junior year.

>>685459844
What is college level calc 2

>>685459468
go away

>>685456895
This is retarded

>>685445066
Parenthesis first
square root of 4= 2
2-3=-1
-1 squared= 1
Then mulitplation
2 squared= 4
5*4=20
Addition and subtraction
20+2=22
4+3=7
7-22=-15
-15-1= -16

>>685459931
its highschool calculus in a private school so this guy thinks hes mad smart

>>685451730
>Reply to Thread No.685445066
How come the (-3/4)s don't cancel out?

>>685451338
I too got -10. These cucks can't math properly

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>>685451519
>square is always positive
>(i)^2
>talks about 'many'

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>>685445066
The answer is 9. You're welcome.

>>685460085
thank you god for not making me this stupid

>>685460085
BODMAS works so much better than silly american way. Stops things like this from happening

>>685460265
U wot m8
Bodmas is canonically isomorphic to pemdas

>>685460056
Make me.

>>685459483
ok man ima break it down for you.

THE SQUARE ROOT OF X

has twwwwwwwwoo answers. Two seperate answers. Just because √4 = + or - 2
doesnt mean that -2= 2
it means that the two possible solutions are
-2
OR
2
ok harvard cum degree?
okay??

>>685459931
Multiple partial derivatives and all the extra tricks to solve complex integrals. Basic limits, derivatives, and integrals are calc1.

>>685460117
I went to public school, faggot. It just wasn't an innercity, nignog infested shithole.

>>685445066
all you fucking retards need to go back to school
The answer is 0

>4+3-5*2^2+2-(sqroot4 - 3)^2
>4+3-5*2^2+2-(4+9- 2*4*3)
>4+3-5*2^2+2-(13-24)
>4+3-5*2^2+2-(-11)
>4+3-5*2^2+2+11
>4+3-5*4+2+11
>4+3-20+2+11
>7-20+13
>13+13
0

>>685460072
Why?

>>685445066
As always, PEMDAS
4+3-5*2^2+2-(√4-3)^2
4+3-5*2^2+2-(√4-3)(√4-3)
4+3-5*2^2+2-(4-√4(3)-√4(3)+9)
4+3-5*2^2+2-(13-6√4)
4+3-5*4+2-(13-6√4)
4+3-20+2-(13-6√4)
7-20+2-13+6√4
-13+2-13+6√4
-11-13+6√4
-24+6√4
-24+6*2
-24+12
-12

Google it faggots

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13

>>685460380
yes but in a much simpler way.

BRACKETS not parenthesis which confuses people like >>685460085

>>685460117
oh so you did high level highschool maths. Congratz man thats super unusual never seen anyone do that.
Your school must be ahead of other nations there buddy wow fuck me why even bother going to uni I think you should apply to NASA

>>685445066
-12

>>685460862
Use BIDMAS in the UK. Brackets, Indices, etc.

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>>685459183
kek

>>685445066
-12