将下列函数展开为幂级数：[tex=8.786x2.786]wO+xnQANIHuRU92XfflXdvAinW/slZkGE/o4SUy4nxS+Eg3T2s3hSRfjTL7DcWaN[/tex]，[tex=2.143x1.214]tdCvNhxRsqsLUuT26x641A==[/tex].
将下列函数展开为幂级数：[tex=8.786x2.786]wO+xnQANIHuRU92XfflXdvAinW/slZkGE/o4SUy4nxS+Eg3T2s3hSRfjTL7DcWaN[/tex]，[tex=2.143x1.214]tdCvNhxRsqsLUuT26x641A==[/tex].
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