- #1
lionely
- 576
- 2
Homework Statement
Find the volumes of the solids generated
a) x-3y+3= 0, x=0 , y=2 about the x axis
I sketched the graph got a straight line,
I then proceeded to integrate y2
∏∫y2δx
=[(x^3/27)+(x^2/3)+ (x)] from x=3 to x=-3
I got 8∏
but the answer is 5∏
b) x-y2-1=0, x=2 about the y-axis
∏∫x2δy
= [ (y^5/5) + (2y3/3) + (y)] from x=1 to x=-1
I got (56/15)∏ for this one but the answer is (64/15)∏