Question

sum of 1 to n natural numbers is 36 , then find the value of n.​

Answer 1

Answer:

sum of n natural numbers = 36

n(n+1)/2 = 36

n² + n = 72

n² + n -72 = 0

n² + 9n - 8n -72 = 0

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

n = -9 and n = 8

and n can't be negative

so n =8

hope this will help you