Question

if sum to 'n' terms of an AP is 3n*+4n then the common difference of AP is_​

Answer 1

Answer:

The common difference is 3.

d=3

Step-by-step explanation:

A simple way to find the common difference of this type of questions is to simply take the coefficients of nth term of n squared term.In this question,it is 3.So,3 is the common difference.

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Answer 2

Step-by-step explanation:

In 3n+4n^2

Put n=1,2, 3

Then s1 comes to be 7

S2 = 22

S3 = 45

We know that T1 = s1= 7

T2 = s2 - s1 = 22- 7 = 15

T3 = s3 - s2 = 45 - 22 = 23

Common difference = T2 - T1 = 15-7= 8

T3- T2 = 23- 15 = 8

Therfore common difference = 8