Branimir
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 Dec11 awarded Yearling May14 awarded Caucus Sep28 awarded Supporter Sep27 comment Find the sum to n terms of the series $\displaystyle \frac{1} {1.2.3.4} + \frac{1} {2.3.4.5} + \frac{1} {3.4.5.6}$ You challenged my tex skills :) Try to expand expression for example for n=3, you will see that second addend for "k" is the same but with opposite sign as first addend for "k+1". Sep27 revised Find the sum to n terms of the series $\displaystyle \frac{1} {1.2.3.4} + \frac{1} {2.3.4.5} + \frac{1} {3.4.5.6}$ more details Sep27 comment Find the sum to n terms of the series $\displaystyle \frac{1} {1.2.3.4} + \frac{1} {2.3.4.5} + \frac{1} {3.4.5.6}$ Fixed typo in last expression. Is it ok now? Sep27 revised Find the sum to n terms of the series $\displaystyle \frac{1} {1.2.3.4} + \frac{1} {2.3.4.5} + \frac{1} {3.4.5.6}$ edit last term in 1 to n sum Sep27 awarded Editor Sep27 comment Find the sum to n terms of the series $\displaystyle \frac{1} {1.2.3.4} + \frac{1} {2.3.4.5} + \frac{1} {3.4.5.6}$ @Moron Thank for your comment Sep27 revised Find the sum to n terms of the series $\displaystyle \frac{1} {1.2.3.4} + \frac{1} {2.3.4.5} + \frac{1} {3.4.5.6}$ added 166 characters in body Sep27 awarded Teacher Sep27 answered Find the sum to n terms of the series $\displaystyle \frac{1} {1.2.3.4} + \frac{1} {2.3.4.5} + \frac{1} {3.4.5.6}$