Question

Solving the equation we get the sum
of first 122 even natural numbers as.
1)- 15,006
2)-15.252
3)-14,520​

Answer 1

Answer:

We know that even natural numbers are 2,4,6,8,10.......

It is in AP series 

So, 

a=2

d=2

n=123

S=2n[2a+(n−1)d]

S=2123[2×2+(123−1)×2]

S=2123[4+122×2]

S=123×124

S=15252