Question

The sum of the first n even natural number is
2n
n(n+1)
4n
n(n+2)​

Answer 1

Answer:

We know, Sum formula

S

n

=

2

n

[a+l]

a= First term

n= number of terms

a

n

=n

th

term

l= last term

Given sum =2+4+6+8+....+2n

=

2

n

(2+2n)=n(n+1).