2/1*3+2/3*5+2/5*7+.+2/97*99+2/99*101
=1-1/3+1/3-1/5+1/5-1/7+...+1/97-1/99+1/99-1/101
=1-1/101
=100/101
2/(1*3)+2/(3*5)+2/(5*7)+……+2/(97*99)
1个回答
相关问题
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2/1*3+2/3*5+2/5*7……+2/97*99+2/99*101
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2/1*3+2/3*5+2/5*7+.+2/97*99=2/99*101
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2/（1*3）+2/（3*5）+2/（5*7）+2/（7*9）+.+2/（95*97）+2/（97*99）=?
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2/3*5+2/5*7+2/7*9+······+2/97*99
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2/1*3+2/3*5+2/5*7+2/7*9+……+2/97*99的简便运算
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2/1X3+2/3X5+2/5X7+.+2/97X99=
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计算：[2/1×3]+[2/3×5]+[2/5×7]+…+[2/97×99]．
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设S=2/(1×3)+2^2/(3×5)+2^3/(5×7)+…+2^49/(97×99),T=1/3+2/5+2^2/
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1+2-3-4+5+6-7-…+97+98-99-100=