这道题有大佬给看看吗

2025-01-01 05:35:48
推荐回答(1个)
回答1:

=2∫(0.∞)1/x³√(x^(-6)+1)dx
=-∫1/√(x^(-6)+1)dx^(-2)
=∫(0.∞)1/√(u³+1)du