Question

how the formula of sum of first n terms of an arithmetic progression is calculated ​

Answer 1

Explanation:

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Answer 2

Given :-

• If the first term is 'a' and common difference is 'd'

To Find :-

• Formula to calculate the sum of n terms of an arithmetic progression is

Solution :-

The formula to calculate the sum of n terms of an arithmetic progression is

$\pink\implies$n/2 {2a + (n - 1)d}

Where

n = number of terms

a = First term

d = common difference