Question

if n-1 ,n-2 ,n-3....... are in ap then find an​

Answer 1

Answer:

if n = 1

Step-by-step explanation:

1-1,1-2,1-3

0,-1,-2

Answer 2

Answer:

n-a

Step-by-step explanation:

In this arithmetic regression, the common difference is 1.

The a(th) term of an AP is the first term plus no. of terms into common difference.

Simply, it is a+d*(n-1).

In our case,

a is n-1, n-1 is a-1, d is -1

So, the a(th) term would be n-1+((a-1)*-1)

The a(th) term would be n-1-a+1=n-a.