将∫(0,1)dx∫(0,1-x)dy∫(0,x+y)f(x,y,z)dz按y,z,x的次序积分为?

积分∫(0,1)dx∫(0,根号x)dy 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 交换积分次序∫(0,1)dy∫(0,y)f(x,y)dx+∫(1,2)dy∫(0,2-y)dxf(x,y)dx 将∫(0,1)dx∫(0,1-x)dy∫(0,x+y)f(x,y,z)dz按y,z,x的次序积分为? ∫(0→1)dx∫(0→1-x)f(x,y)dy=? ∫[0,1] dx∫[0,x]f(x,y)dy= ? ∫(0到1)dx∫(x到根号下x)siny/y dy=? ∫(0到1)dx∫(x到根号下x)siny/y dy=? ∫(2,0) (x+y)dx+(x–y)dy怎么算 (1,0) y= ∫[0,x](t-1)^3(t-2)dt,dy/dx(x=0) ∫[0,1] dx∫[-x^2,1] f(x,y)dy+∫[1,e] dx∫[lnx,1] f(x,y)dy交换积分次序∫[0,1] dy∫[0,1] f(x,y)dx=∫[0,1] x| [0,1]dy= ∫[0,1] dy=∫y| [0,1]=1? ∫[0,1] dx∫[-x^2,1] f(x,y)dy+∫[1,e] dx∫[lnx,1] f(x,y)dy交换积分次序∫[0,1] dy∫[0,1] f(x,y)dx=∫[0,1] x| [0,1]dy= ∫[0,1] dy=∫y| [0,1]=1? 计算二重积分：∫[0,1]dx∫[0,x^½]e^(-y²/2)dy ∫(0,1)dx∫(0,x)e^(-y)dy怎么解? 计算积分 ∫(上限1,下限0)dx∫(上限1,下限x)siny^2dy 计算积分∫(1,0)dx∫(1,x)e^—y^2dy 计算二次积分∫(0,1)dy∫(√y,1)sin x^3 dx 求二次积分 ∫（0-1）dx∫(x-1)e^(-y²)dy