Question

find the sum of first 123 even natural numbers​

Answer 1

Step-by-step explanation:

sum of first 123even natural natural no

a=2

d=4-2

=2

find S123

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

S123=123/2(2×2(123-1)×2)

=123/2(4×122×2)

=123/2×976

=123×488

=60024