更换积分次序∫(0,2)dx∫(x,3x)f(x,y)dy

更换积分次序∫(0,2)dx∫(x,3x)f(x,y)dy 交换积分次序 ∫(4,0)dx∫(x,2x^0.5)f(x,y)dy 更换积分∫（01）dx∫（1,根号x）f（x,y）dy的积分次序为? ∫[0,1] dx∫[-x^2,1] f(x,y)dy交换积分次序 变换积分次序∫(0,1)dy∫(-y,1+y^2)f(x,y)dx 交换积分次序∫(1,0)dx∫(x,0)f(x,y)dy+∫(2,1)dx∫(2-x,0)f(x,y)dy 交换累次积分的次序∫（0>1) dy∫(0>2y) f(x,y)dx +∫(1>3) dy∫(0>3-y) f(x,y) 交换积分次序∫(1,0)dx∫(x,0)f(x,y)dy 交换积分次序：∫(0,1/2)dx∫(x,1-x)f(x,y)dy= 交换积分次序∫(0,1)dy∫(0,y)f(x,y)dx+∫(1,2)dy∫(0,2-y)dxf(x,y)dx 交换积分次序,∫(上限4,下限2)dx∫(上限x+2,下限0)f(x,y)dy 改变积分次序∫.(-a,a)dx∫(0,(根号a^2-x^2))f(x,y)dy