1- 1/2^2 -1/2^3 -…-1/2^n 此题的答案应该是多少,怎么解,
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1-1/2^2-1/2^3-…-1/2^n此题的答案应该是多少,怎么解,1-1/2^2-1/2^3-…-1/2^n此题的答案应该是多少,怎么解,1-1/2^2-1/2^3-…-1/2^n此题的答案应该
1- 1/2^2 -1/2^3 -…-1/2^n 此题的答案应该是多少,怎么解,
1- 1/2^2 -1/2^3 -…-1/2^n 此题的答案应该是多少,怎么解,
1- 1/2^2 -1/2^3 -…-1/2^n 此题的答案应该是多少,怎么解,
1- 1/2^2 -1/2^3 -…-1/2^n
=1- (1/2^2+1/2^3 +…+1/2^n)
=1- (-1/2+1/2+1/2^2+1/2^3 +…+1/2^n)
=3/2-1/2*(1-(1/2)^n)/(1-1/2)
=3/2-(1-(1/2)^n)
=1/2^n-1/2
1、求证:1/1^2+1/2^2+1/3^2+……+1/2008^2
(1-1+2/1)*(1-1+2+3/1)……(1-1+2+3……2011/1)
1+1/1+2+1/123+……+1/1+2+3+……+99
(1+1/2)×(1-1/2)×(1+1/3)×(1-1/3)×……×(1+1/100)×(1-1/100)
1+1+2+3……+100
证明1/2+1/2^2+1/2^3……+1/2^n小于1
1+2/1+1+2+3/1+…1+2+3+…100/1等于?
巧算:(1/1+2)+(1/1+2+3)+…+(1/1+2+3+…+20)
(1/1+2)+(1/1+2+3)+…+(1/1+2+3…+2000)
(1/2+1/3+……+1/1997)*(1+1/2+……+1/1996)-(1+1/2+.+1/1997)*(1/2+1/3+.+1/1996)
(1/2+1/3+…+1/2003)(1+1/2+…+1/2002)-(1+1/2+…+1/2003)(1/2+1/3+…+1/2002)=?
1/1+2+1/1+2+3+1/1+2+3+4+…+1/1+2+3+…+50
1/(1-1/2)/(1-1/3)/(1-1/4)/……/(1-1/2012)
1+1/2+1/3+ ……1/9999=?
计算:(1-1/2^2)(1-1/3^2)(1-1/4^2)……(1-1/30^2)
(1-1/2^2)(1-1/3^2)(1-1/4^2)……(1-1/2010^2)
(1-1/2^2)(1-1/3^2)(1-1/4^2)……(1-1/100^2)=( )
(1-1/2^2)(1-1/3^2)(1-1/4^2)……(1-1/2011^2)