Question

nth term of an ap is a=4n-5 find the common difference​

Answer 1

Step-by-step explanation:

The n

th

term of an A.P, whose first terms is a and common difference is d, is T

n

=a+(n−1)d

Which can also be written as T

n

=(a−d)+nd

On comparing this with the given n

th

term, we get

T

n

=(a−d)+nd=4n+1

From this, we get

a−d=1 and d=4

Therefore, first term, a=5 and common difference d=4.