3/2-1/6+19/12-11/20+41/30-29/42+71/56
=1+1/2-1+5/6+1+7/12-1+9/20+1+11/30-1+13/42+1+15/56
=1+1/2+5/6+7/12+9/20+11/30+13/42+15/56
=1+1/2+1/2+1/3+1/3+1/4+1/4+1/5+1/5+1/6+1/6+1/7+1/7+1/8
=1+1+2/3+1/2+2/5+1/3+2/7+1/4
=3+3/4+2/5+2/7
=4又3/20+2/7
=4又61/140
3/2-1/6+19/12-11/20+41/30-29/42+71/56 怎样用裂项解决,
1个回答
相关问题
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1-1/2+5/6+11/12+19/20+29/30+41/42+55/56+71/72
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1/2+5/6+11/12+19/20+29/30+41/42+55/56=
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1/2+5/6+11/12+19/20+29/30+41/42+55/56+71/72 怎么做 要有过程
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1/2+5/6+11/12+19/20+29/30+41/42=?=多少
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1 1/2-2 5/6+3 1/12-4 19/20-5 1/30+6 41/42-7 1/56+8 71/72-9 1
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做出这到题1 1/2-2 5/6+3 1/12-4 19/20+5 1/30-6 41/42+7 1/56-8 71/7
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1*1/2-2*5/6+3*1/12-4*19/20+5*1/30-6*41/42+7*1/56-
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裂项3/5+6/7+7/12+9/20+11/30+13/42等于多少
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1又1/2－2又5/6＋3又1/12－4又19/20＋5又1/30－6又41/42＋7又1/56－8又71/72＋9又1
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找规律填数1/2,5/6,11/12,19/20,（ ）,41/42.