求定积分(x³+sin²x)cos^4 xdx 范围为(-π/2,π/2)
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求定积分(x³+sin²x)cos^4 xdx 范围为(-π/2,π/2)
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求定积分(x³+sin²x)cos^4 xdx 范围为(-π/2,π/2)
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