1/2(1-1/3)+1/2(1/3-1/5)+1/2(1/5-1/7)+.+1/2(1/99-1/101)=1/2(1-1/3+1/3-1/5+1/5-1/7+.+1/99-1/101)=1/2(1-1/101)=1/2*100/101=50/101
1/1*3+1/3*5+.+1/99*101
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相关问题
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1/1*3+1/3*5+1/5*7+……+1/97*99+1/99*101
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1/3+1/3*5+1/5*7.1/99*101
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1/1*3 + 1/3*5 + 1/5*7 + .+ 1/99*101
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1/1*3+1/3*5+1/5*7+.+1/99*101
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1/1*3*5+1/3*5*7+.1/99*101*103
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1*3/1+3*5/1+5*7/1+.+99*101/1=多少!为什么
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1/1*3+1/3*5+1/5*7+...+1/99*101=?(要简便)
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1/1X3+1/3X5+…….+1/99X101
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1/(1*3)+1/(3*5)+1/(5*7)+...+1/(97*99)+1/(99*101)谁帮忙解一下!
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1+3+5【省略号】99+101=?