Question

sum of 1 to n natural numbers is 60, then find the value of n​

Answer 1

Step-by-step explanation:

Sn = n/2 (2a +(n-1)d)

as they are natural no. so sum will be

n (n+1)/2 =60

n^2 +n -120

-b +-(√b^2 -4ac) /2

-1 +- √ 1 +480)/2

-1 +- √481)/2