Question

The sum of first 73 natural numbers is
(A) 2701
(B) 2810
(C) 2700
(D) 2840​

Answer 1

Answer:

2701

Step-by-step explanation:

formulae for sum of 1st n natural numbers is n(n+1)/2

according to problem n=73

there fore sum of 1st 73 natural numbers=73(73+1)÷2

=73×74÷2

=2701

Answer 2

Given;n=73

To Find; Sum of the first 73 natural numbers.

Solution; a=1 , n=73, d=1

an= a+(n-1)d

=1+72

=73

Sn=73(74)/2

=2701

Hence the sum is 2701