Hey /wsr/ I need help understanding how I would go about solving

>>42844
2nd one isn't that bad. When is it due?

in 26 hours

>>42848
I'll try the bottom one, I have no idea what the top one is doing.

>>42844
In the second problem you have a third equation, since the sum of the elements is equal to 1 translates to
x + y + z = 1 (3)

(3) and (2) give
2x = 4
x = 2
(1) gives
2 x + 3 y = 0
3y = - 4
y = -4/3

(2) gives
x - y - z = 3
2 + 4/3 - z = 3
z = 1/3

>>42857
Oh yeah, of course.

That was quite easy then :P

Thanks

>>42844
Ax = 0 implies
x+ay=0
bx+y=0

parametric equation for the line is (8t,-5t)
so
8t-5at=0
8bt-5t=0
then a=8/5 b=5/8

File: 14538450817371361918376.jpg (5MB, 5312x2988px) Image search: [Google]

5MB, 5312x2988px

>>42857
Dammit, I was on z when I saw this.

I tried putting it in a matrix and putting it in row-reduced echelon form, but failed at what should've been a simple task, sorry. Plugging this into a calculator or matlab-like software would solve it for you, though it seems it has already been solved.
[ 2 3 0 0]
[ 1 -1 -1 3]
[ 1 1 1 1]