Calcolare D (x2 - y2) dxdy
dove
D = {(x, y) R2 | x >= 0, x <= 1, 2x2 - y >= 0, y - x2 >= 0}.
Soluzione.
Si ha
D (x2 - y2)dxdy = 01 (x22x2 (x2 - y2)dy) dx =
= 01 (yx2 - y3/3) |x22x2 dx = 01 x4 - 7/3x3 dx = 1/5x5 - 1/3x7 |01 = -2/15.
dove
D = {(x, y) R2 | x >= 0, x <= 1, 2x2 - y >= 0, y - x2 >= 0}.
Si ha
D (x2 - y2)dxdy = 01 (x22x2 (x2 - y2)dy) dx =
= 01 (yx2 - y3/3) |x22x2 dx = 01 x4 - 7/3x3 dx = 1/5x5 - 1/3x7 |01 = -2/15.