∫—11x(1+x2009)(ex—e—x)dx=__________.

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问题—11x(1+x2009)(ex—e—x)dx=__________.

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答案[*]

解析 原式=∫—11x(ex—e—x)dx+∫—11x(ex—e—x)dx.
ex—e—x为奇函数,x(ex—e—x)为偶函数,x2010(ex—e—x)为奇函数.
所以∫—11x2010(ex+e—x)dx=0.
—11x(ex—e—x)dx=2∫01xd(ex+e—x)
=2[x(ex+e—x)|∫01—∫01x+e—x)dx]
=
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