简便计算1/2+1/2x3+1/3x4+1/4x5+...+1/99x100
问题描述:
简便计算1/2+1/2x3+1/3x4+1/4x5+...+1/99x100
答
原式=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+……+1/99-1/100
=1-1/100
=99/100
明白请采纳,
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