(45+46+47+...+113+114+115)=? Please explain me in details
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Answered by
1
Answer:
5680
Step-by-step explanation:
the final answer is equal to the difference of sum of first 115 natural numbers and the sum of first 44 natural numbers.
we know that,
sum of first n natural numbers =n(n+1)/2
so, our final answer is
115(116)/2 - 44(45)/2
= 115*58 - 22*45
=6670 - 990
=5680
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