(1-2^2/1)(1-3^2/1)(1-4^2/1)…(1-99^2/1)(1-100^2/10) 简便方法计算
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(1-2^2/1)(1-3^2/1)(1-4^2/1)…(1-99^2/1)(1-100^2/10)简便方法计算(1-2^2/1)(1-3^2/1)(1-4^2/1)…(1-99^2/1)(1-100
(1-2^2/1)(1-3^2/1)(1-4^2/1)…(1-99^2/1)(1-100^2/10) 简便方法计算
(1-2^2/1)(1-3^2/1)(1-4^2/1)…(1-99^2/1)(1-100^2/10) 简便方法计算
(1-2^2/1)(1-3^2/1)(1-4^2/1)…(1-99^2/1)(1-100^2/10) 简便方法计算
题目应是(1-2^2/1)(1-3^2/1)(1-4^2/1)…(1-99^2/1)(1-100^2/1)
=(1-2/1)(1+2/1)(1-3/1)(1+3/1).(1-99/1)(1+99/1)(1-100/1)(1+100/1)
=(1-2/1)(1-3/1).(1-99/1)(1-100/1)(1+2/1)(1+3/1).(1+99/1)(1+100/1)
=(2/1)(3/2).(99/98)(100/99) (2/3)(3/4).(99/100)(100/101)
=(100/1) (2/101)
=200/101
(1/2+1/3+...+1/2004)(1+1/2+1/3+...+1/2003)-(1+1/2+1/3+...+1/2004)(1/2+1/3+...+1/2003)
(1-1/2^2)(1-1/3^2)K(1-1/10^2)
(1-1/2^2)(1-1/3^2)K(1-1/10^2)
计算:(1/2+1/3+...+1/2011)*(1+1/2+1/3+...+1/2010)-(1+1/2+1/3+...+1/2011)*(1/2+1/3+...+1/2010)
计算(1-1/2-1/3-...-1/2010)*(1/2+1/3+..+1/2011)-(1-1/2-1/3-...-1/2011)*(1/2+1/3+...+1/2010)
(1/2+1/3+...+1/2007)*(1+1/2+1/3+...+1/2006)-(1+1/2+1/3+...+/2007)*(1/2+1/3+...+1/2006)
计算:(-1)-[1-(1-1/2*1/3)]*6
计算!(-1)-[1-(1-1/2*1/3)]*6
(1/1+2)+(1/1+2+3)+…+(1/1+2+3…+2000)
200*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/100)
(1+1/2+1/3+...
(1/3m-1/2)^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)*...*(1-1/2004^2)
(1/2+1/3+...+1/2004)(1+1/2+...+1/2003)-(1+1/2+..+1/2004)(1/2+1/3+..+1/2003)
(1-1+2/1)*(1-1+2+3/1)……(1-1+2+3……2011/1)
1-1/2+1/3-1/4+.+1/(2n-1)-1/2n=1/(n+1)+1/(n+2)+1/(3+n).+1/2n
1/1+1/(1+2)+1/(1+2+3)+.+1/(1+2+3+.+100)不用计算器