请问下面这道高数题如何做?请写出详细解答 10
2016-08-06
展开全部
交换积分次序
原式=∫y²dy∫sin(xy)dx (0≤y≤1,-√(1-y²)≤x≤√(1-y²))
=∫y[-cosy√(1-y²+cosy√(1-y²+]dy (0≤y≤1)
=∫0dy (0≤y≤1)
=0
原式=∫y²dy∫sin(xy)dx (0≤y≤1,-√(1-y²)≤x≤√(1-y²))
=∫y[-cosy√(1-y²+cosy√(1-y²+]dy (0≤y≤1)
=∫0dy (0≤y≤1)
=0
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谢谢了啊
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