数学试题讲解

设图数

f (x, y)

在

R^{\circ}

上进续, 交抰祭次积分的顺序

\int_{- 2}^{1} d x \int_{x^{2}}^{2 - x} f (x, y) d y =

\int_{1}^{4} d y \int_{\sqrt{y}}^{2 - y} f (x, y) d x

. B.

\int_{1}^{4} d y \int_{2 - y}^{\sqrt{y}} f (x, y) d x

. C.

\int_{0}^{1} d y \int_{\sqrt{y}}^{2 - y} f (x, y) d x + \int_{1}^{4} d y \int_{2 - y}^{\sqrt{y}} f (x, y) d x

. D.

\int_{0}^{1} d y \int_{\sqrt{y}}^{\sqrt{y}} f (x, y) d x + \int_{1}^{4} d y \int_{- \sqrt{y}}^{2 - y} f (x, y) d x