Question

Find the sum of first 26 even natural number​

Answer 1

Answer:

702 is the sum of first 26 even numbers.

Answer 2

Answer:

First even natural number = 2

a= 2

Now 26 th even natural number = 26×2 = 52

So, l= 52

Now

Sum = n(a+l) /2

= 26(54)/2

= 702