Question

The sum of the natural numbers from 1 to n is 36 .Find the value of n ...​

Answer 1

Step-by-step explanation:

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Answer 2

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Sum of n natural numbers = n(n+1)/2

36 = n(n+1)/2

72 = n² + n

n² + n - 72 = 0

(n + 9)(n - 8) = 0

n = - 9 or n = 8

Since n cannot be negative, n = 8

The value of n is 8.

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