Question

1
The sum of first n positive integers is given by
(a)n(n-1)/2
(b)n(2n+1)/2
(c) n(n+1)/2
(d) none of these​

Answer 1

Answer:

i think its option (c) n(n+1)/2

mark me the brainliest if you like

Answer 2

Answer:

(c) n(n+1)/2

This is your correct answer.

For example, to find the sum of first 3 positive numbers...

First 3 positive numers are 1, 2, and 3

Their sum is 6

n(n+1)/2 = 3*(3+1)/2

= 12/2 = 6

Hope this helpsyou friend...

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