单选题 难度 3 设 f(x,y)f(x,y)f(x,y) 是连续函数，则累次积分 ∫04dx∫x2xf(x,y) dy=\int_0^4 dx\int_x^{2\sqrt{x}} f(x,y)\,dy=∫04dx∫x2xf(x,y)dy=（ ） A 选项 A ∫04dy∫y2/4yf(x,y) dx\int_0^4dy\int_{y^2/4}^{y}f(x,y)\,dx∫04dy∫y2/4yf(x,y)dx B 选项 B ∫04dy∫−yy2/4f(x,y) dx\int_0^4dy\int_{-y}^{y^2/4}f(x,y)\,dx∫04dy∫−yy2/4f(x,y)dx C 选项 C ∫04dy∫1/4yf(x,y) dx\int_0^4dy\int_{1/4}^{y}f(x,y)\,dx∫04dy∫1/4yf(x,y)dx D 选项 D ∫04dy∫y2/2yf(x,y) dx\int_0^4dy\int_{y^2/2}^{y}f(x,y)\,dx∫04dy∫y2/2yf(x,y)dx 答案与解析 微信扫描二维码 免费获取正确答案和解析
