Calcolare
integralD (xy2 - x2y)dxdy
dove
D = {(x, y) in R2 | 0 <= y <= 1, |x| - y <= 0}.
Soluzione
Si ha
integralD (xy2 - x2y)dxdy = integral01 (integral-yy xy2 - x2y dx) dy =
= integral01 (x2y2/2 - x3y/3)|-yy dy = -2/3 integral01 y4dy = -2/15.
integralD (xy2 - x2y)dxdy
dove
D = {(x, y) in R2 | 0 <= y <= 1, |x| - y <= 0}.
Si ha
integralD (xy2 - x2y)dxdy = integral01 (integral-yy xy2 - x2y dx) dy =
= integral01 (x2y2/2 - x3y/3)|-yy dy = -2/3 integral01 y4dy = -2/15.