数学题,急!要过程! 1-1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256 -1/10*11-1/11*12-1/12*13-…1-1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256 -1/10*11-1/11*12-1/12*13-……-1/19*201/1*4+1/4*7+1/7*10+……1/37*40(5 1/2-2 1/3-1 5/6)*(-18)-(-2)*8
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![数学题,急!要过程! 1-1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256 -1/10*11-1/11*12-1/12*13-…1-1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256 -1/10*11-1/11*12-1/12*13-……-1/19*201/1*4+1/4*7+1/7*10+……1/37*40(5 1/2-2 1/3-1 5/6)*(-18)-(-2)*8](/uploads/image/z/57895-7-5.jpg?t=%E6%95%B0%E5%AD%A6%E9%A2%98%2C%E6%80%A5%21%E8%A6%81%E8%BF%87%E7%A8%8B%21+1-1%2F2-1%2F4-1%2F8-1%2F16-1%2F32-1%2F64-1%2F128-1%2F256+-1%2F10%2A11-1%2F11%2A12-1%2F12%2A13-%E2%80%A61-1%2F2-1%2F4-1%2F8-1%2F16-1%2F32-1%2F64-1%2F128-1%2F256+-1%2F10%2A11-1%2F11%2A12-1%2F12%2A13-%E2%80%A6%E2%80%A6-1%2F19%2A201%2F1%2A4%2B1%2F4%2A7%2B1%2F7%2A10%2B%E2%80%A6%E2%80%A61%2F37%2A40%EF%BC%885+1%2F2-2+1%2F3-1+5%2F6%EF%BC%89%2A%EF%BC%88-18%EF%BC%89-%EF%BC%88-2%EF%BC%89%2A8)
数学题,急!要过程! 1-1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256 -1/10*11-1/11*12-1/12*13-…1-1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256 -1/10*11-1/11*12-1/12*13-……-1/19*201/1*4+1/4*7+1/7*10+……1/37*40(5 1/2-2 1/3-1 5/6)*(-18)-(-2)*8
数学题,急!要过程! 1-1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256 -1/10*11-1/11*12-1/12*13-…
1-1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256
-1/10*11-1/11*12-1/12*13-……-1/19*20
1/1*4+1/4*7+1/7*10+……1/37*40
(5 1/2-2 1/3-1 5/6)*(-18)-(-2)*87.5*(-5)
(-2/5)*8-(-2/9)*(-4)+(-8)*3/5
(1-2)(2-3)(3-4)……(2009-2010)
数学题,急!要过程! 1-1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256 -1/10*11-1/11*12-1/12*13-…1-1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256 -1/10*11-1/11*12-1/12*13-……-1/19*201/1*4+1/4*7+1/7*10+……1/37*40(5 1/2-2 1/3-1 5/6)*(-18)-(-2)*8
1-1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256
=1-1/2+1/2-1/4*1/4-1/8+1/8-1/16+1/16-1/32+1/32-1/64+1/64-1/128+1/128-1/156
=155/156
23
23或0或1......
这是什么题额?! 这种题答案 一般 不是1就是0 呵呵
连式加减乘除要找到规律
1/n-1/(2n)=1/(2n)
1/(n*n+1)=1/n-1/(n+1)
n/(3n+1)+1/((3n+1)(3(n+1)+1))=(n(3(n+1)+1)+1)/((3n+1)(3(n+1)+1))=(n+1)/(3(n+1)+1)