计算反常积分:
+∞-∞x2/(1+x6)dx
计算反常积分:
+∞-∞x2/(1+x6)dx
【正确答案】:∫+∞-∞x2/(1+x6)dx =1/3∫+∞-∞1/(1+x6dx3) =1/3arctanx3|+∞-∞ =1/3[π/2-(-π/2)] =π/3
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