《复变函数与积分变换》求解答
2个回答
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y=(x^2-2x+5)^10
那么求导得到
y'=10 (x^-2x+5)^9 *(x^2-2x+5)'
=10 (x^-2x+5)^9 *(2x-2)
=20(x-1)*(x^-2x+5)^9
继续求导得到
y"=20(x-1)' *(x^-2x+5)^9 + 20(x-1)* [(x^-2x+5)^9]'
=20(x^-2x+5)^9 + 20(x-1)* [9(x^-2x+5)^8 *(2x-2)]
=20(x^-2x+5)^9 + 40(x-1)^2 *(x^-2x+5)^8
那么求导得到
y'=10 (x^-2x+5)^9 *(x^2-2x+5)'
=10 (x^-2x+5)^9 *(2x-2)
=20(x-1)*(x^-2x+5)^9
继续求导得到
y"=20(x-1)' *(x^-2x+5)^9 + 20(x-1)* [(x^-2x+5)^9]'
=20(x^-2x+5)^9 + 20(x-1)* [9(x^-2x+5)^8 *(2x-2)]
=20(x^-2x+5)^9 + 40(x-1)^2 *(x^-2x+5)^8
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