i have calculus homework and more but i need help plas i have to do soo many things (yes i am a spanish fag)
>>367369
If I'm understanding this right...
3) a + 2x has to equal 6 as you approach x=8, meaning that a+2(8) = 6. So a = -10. If x=4, then f(x) needs to be -10 + 2(4) = -2. So
(-10(4)^2 + b)/(1+4) = -2
-160 + b = -10
b = 170
You'd do a similar process for 4).
>>367406
Almost. b=150.
>>367406
I guess 4) is a little trickier. Plugging in 4 would mean division by 0, so instead we realize that
x^2 - 16 = (x-4)(x+4)
and simplify the equation so it's just x+4. So
2ax + b = x + 4
plug in 4 for x:
8a + b = 8
b = 8 - 8a
Meanwhile on the top part for x<1, if we do the same simplification trick to get rid of x-1, we have
(a/3) * (x+1)
plug in x=1 while equating to the middle equation:
2a/3 = 2a + b
a(2/3 - 2) = b
b = -4a/3
So we have 2 equations for b now:
8 - 8a = -4a/3
8 = 20a/3
a = 8 * 3 / 20 = 1.2
And therefore b = -1.6.
To check either of these, put them into an online graphing calculator and verify that at the separation points, the graphs appear to intersect.
op here you guys are fucking amazing thx for the help now i can do my other homework in peace