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Find sum(k=1)^(n)(1)/(k(k+1))....

Find `sum_(k=1)^(n)(1)/(k(k+1))`.

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The correct Answer is:
`=1-(1)/(n+1)`
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FULL MARKS-BINOMIAL THEOREM, SEQUENCES AND SERIES -Additional Questions Solved
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  8. If three consecutive coefficients in the expansion of (1+x)^(n) are in...

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  9. If the sum of the coefficients in the expansion of (x+y)^(n) is 4096. ...

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