化简:x(x+1)分之1+（x+1)(x+2)分之1+(x+2)(x+3)分之1+.+（x+2006)(x+2007)分之1_数学解答

化简:x(x+1)分之1+（x+1)(x+2)分之1+(x+2)(x+3)分之1+.+（x+2006)(x+2007)分之1

人气：120 ℃　时间：2020-04-04 05:54:59

解答

1/x(x+1)=1/x-1/(x+1)
1/(x+1)(x+2)=1/(x+1)-1/(x+2)
.
1/(x+2006)(x+2007)=1/(x+2006)-1/(x+2007)
x(x+1)分之1+（x+1)(x+2)分之1+(x+2)(x+3)分之1+.+（x+2006)(x+2007)分之1
=1/x-1/(x+1)+1/(x+1)-1/(x+2)+.+1/(x+2006)-1/(x+2007)
=1/x-1/(x+2007)
=2007/x(x+2007)