利用换元积分法和分部积分法计算下列各定积分：[tex=7.286x2.786]2IsyRgu6F/sOeO48rmKf9C7fq9AIwmKObH1ZTyml1QIN/YG4y32ohpKbFZ1SSk91Hf47FfiswdJsGEmfE5RvWt+SsbvdZ+M3cf19/JjvoKc=[/tex]
利用换元积分法和分部积分法计算下列各定积分：[tex=7.286x2.786]2IsyRgu6F/sOeO48rmKf9C7fq9AIwmKObH1ZTyml1QIN/YG4y32ohpKbFZ1SSk91Hf47FfiswdJsGEmfE5RvWt+SsbvdZ+M3cf19/JjvoKc=[/tex]
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