Question

find the sum of first 123 even natural numbers ​

Answer 1

Step-by-step explanation:

Talking about natural no.s that starts from 1.....

first even natural no.=2

We will form an Ap :

2,4,6_ _ _ _

a=2

d=2

n=123

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

Sn=123/2 [4+ (122)×4]

Sn=30258

Heyy dude not sure about the answer... but just follow the steps :)

Answer 2

A N S W E R: 3 7 8 2