1/4+1/28+1/70+……+1/8554 怎么计算,
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1/4+1/28+1/70+……+1/8554 怎么计算,
1/4+1/28+1/70+……+1/8554 怎么计算,
1/4+1/28+1/70+……+1/8554 怎么计算,
1/4+1/28+1/70+……+1/8554
=1/1*4+1/4*7+1/7*10+.1/(91*94)
=1/3*(1-1/4)+1/3(1/4-1/7)+1/3(1/7-1/10)+...+1/3(1/91-1/94)
=1/3(1-1/4+1/4-1/7+1/7-1/10+.+1/91-1/94)
=1/3(1-1/94)
=1/3*93/94
=31/94
1/4+1/28+1/70+…1/89698=?
1/4+1/28+1/70+……+1/8554 怎么计算,
计算1除4+1除28+1除70+……+1除4026040
1/4+1/28+1/70+……+1/550(利用裂项)
谁有这道题的简便算法?1/4+1/28+1/70+…+1/9700=?
1、2、8、28…数列规律?
1/2+1/4+1/8……+1/256
1/2+1/4+1/8+……+1/1024
4分之1+28分之1+70分之1+……+9700分之1=快啊,就要上学了……回答了全部的分都送……回答对了,
1/2-(1/2-1/4)-(1/4-1/8)-……-(1/8192-1/16384)
1+2+3-4+5+6+7-8+9+……+25+26+27-28=
28+27+26+……+1=
计算 (1+1/2)×(1+1/3)×(1+1/4)×……×(1+1/7)×(1+1/8)×计算 (1+1/2)×(1+1/3)×(1+1/4)×……×(1+1/7)×(1+1/8)×(1+1/9)
1+2+3+4+5+6+7+8+……………………………………96+97+98+99+100=
1/4 +1/28 +1/70 +1/130 +1/208
1×4/1+4×7/1+7×10/1……+22×25/1+25×28/1=?
1+2+3+4+5+67+8+9………………100=
1/2+1/4+1/8……+1/256+1/512+1/1024 简便计算,