Sum of first n natural number is given by the formula
→ n(n+1) / 2
Here n = 20
So, Sum = 20(21) / 2
⇒ Sum = 210
Given,
Sum of the first 20 natural numbers
We know that
Where,
↦ Sum of natural numbers = n(n + 1)/2
↦ 20(20 + 1) / 2
↦ 20(21)/2
↦ 420/2
↦ 210
Hence,
210 is the sum of first 20 natural numbers.
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Sum of first n natural number is given by the formula
→ n(n+1) / 2
Here n = 20
So, Sum = 20(21) / 2
⇒ Sum = 210
Verified answer
Answer :
Given :
To find :
Solution :
Given,
Sum of the first 20 natural numbers
We know that
Where,
↦ Sum of natural numbers = n(n + 1)/2
↦ 20(20 + 1) / 2
↦ 20(21)/2
↦ 420/2
↦ 210
Hence,
210 is the sum of first 20 natural numbers.