Calculate the sum of the first 20 even number
Answers
Answered by
6
Hi friend.
Its ur answer.
By using formula
Sum of first n even numbers = n(n+1)
= 20 (20 +1)
= 20 X 21
= 420.
#RehanAhmadXLX
Its ur answer.
By using formula
Sum of first n even numbers = n(n+1)
= 20 (20 +1)
= 20 X 21
= 420.
#RehanAhmadXLX
Answered by
2
It is very easy
first number=2
last number=40
total numbers=20
sum = first number+last number/2×total number
=2+40/2×20
=21×20
=420
the sum of first 20 even numbers is 420
first number=2
last number=40
total numbers=20
sum = first number+last number/2×total number
=2+40/2×20
=21×20
=420
the sum of first 20 even numbers is 420
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