Some of all even natural numbers between 1 and 81 is
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Answer: 1640
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The sum of all even natural numbers between 1 and 81 is 1640.
Step-by-step explanation:
To find : The sum of all even natural numbers between 1 and 81 is ?
Solution :
Th even natural number is in the form 2,4,6,8,....80 forming an arithmetic progression.
Where, first term is a=2
Common difference is d=2
Last term is l=80
The last term formula is
The sum formula of A.P is given by,
Therefore, the sum of all even natural numbers between 1 and 81 is 1640.
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