计算定积分∫10xe-2x2+1dx.
计算定积分∫10xe-2x2+1dx.
【正确答案】:因(-2x2+1)´=-4x,所以用凑微分法.∫10xe-2x2+1dx=∫10e-2x2+1d[(-2x2+1)/-4]=-(1/4)e-2x2+110=1/4(e-e1
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