Posted by Akansha on Tuesday, May 10, 2011 at 7:26pm.
Find the area of the region bounded by the line y=3x and y= x^3 + 2x^2?
and
find the area of the region bounded by the curve y=e^2x 3e^x + 2 and the xaxis?

Calculus  Damon, Tuesday, May 10, 2011 at 8:25pm
Where do they intersect?
3x = x^3 + 2 x^2
x^3 + 2 x^2  3 x = 0
x (x^2 + 2x 3) = 0
x (x+3)(x1) = 0
intersect at x = 3, 0, 1
from x = 3 to x = 0 the cubic is above the line so in that domain the area is integral [ x^3 + 2 x^2  3 x] dx
from x = 0 to x = 1 the line is above the cubic so in that domain the area is
integral [ 3 x  x^3  2 x^2] dx
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