An = An-1-3 when a1 = 5

Consider we need to find the first five terms of the given AP and the explicit formula.

Given:

when

To find:

First five terms of the given AP and the explicit formula.

Solution:

We have,

      ...(i)

, it means first term is 5.

Putting n=2 in (i), we get

Second term is 2. So, common difference is

First terms is 5 and common difference is -3. So, the first five terms of the AP are 5, 2, -1, -4, -7.

The explicit formula of an AP is

Therefore, the explicit formula of AP is .

answer: this is not a question

step-by-step explanation: this is a answer

16 is the absolute value

step-by-step explanation: