Math, asked by riya280238, 11 months ago

12. The sum of the first 20 natural numbers is ......

Answers

Answered by 95lightningmcqueen

1

Answer:

Sn=210

Step-by-step explanation:

a=1 an=20

n=20

Sn=n/2(a+an)

=20/2(1+20)

=10(21)

=210

Answered by ajaysinghkushwaha86

0

Answer:

By using the formula n(n+1)/2

We get 20×21/2 = 210.

I hope it helps you.☺

Step-by-step explanation:

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