Question

If the sum of first n natural number is given by 1/2n×n + 1/2n then the sum of first 5 natural number will be

Answer 1

(1/2)n×n + (1/2)n

(1/2)n(n+1)

NOW PUT 5 IN THE GIVEN FORMULA,

(1/2)5×(5+1)

(1/2)5×6

(1/2)30

15

THEREFORE 15 IS THE REQUIRED ANSWER

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