求定积分:{(x的2次方)乘以[根号下(1减去x的2次方)]}dx,上限是1,下限是0?

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2024-11-08 06:43:59
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网友(1):

[0,1] ∫ x²√(1+x²) dx
= 1/8 [ -2x(1-x²)^(3/2) + x√(1-x²) + arcsinx ] | [0,1]
= 1/8 arcsin1
= π/16