Question

Write the formula to find sum of n terms of arithmetic progression.​

Answer 1

Answer:

Sum of N Terms Formula

It is equal to n divided by 2 times the sum of twice the first term – 'a' and the product of the difference between second and first term-'d' also known as common difference, and (n-1), where n is numbers of terms to be added. For example: 1, 4, 9, 16, 25, 36, 49.

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Answer 2

Answer:

hi mate

Step-by-step explanation:

the formula is

Sn = n/2[2a +(n-1)d]

or

Sn= n/2(a+l)

where l is the last term of ap

a is the first term, n is the number of terms, d is the common difference