Q.

Which of the following gives the sum of the first n natural numbers?

A. nc2
B. (n-1)c2
C. (n+1)c2
D. (n+2)c2
Answer» C. (n+1)c2
Explanation: the sum of first n natural numbers is given by n*(n+1)/2, which is equal to (n+1)c2.
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