Question

The nth term of an arithmetic progression is 1/2(3n - 15).
Find the value of n for which the sum of the first n terms is 84.​

Answer 1

Answer:THIS IS ANSWER.

Step-by-step explanation:The given progression 9, 15, 21, 27, ... .

Clearly, 15 − 9 = 21 − 15 = 27 − 21 = 6 (Constant)

Thus, each term differs from its preceding term by 6. So, the given progression is an AP.

First term = 9

Common difference = 6

Next term of the AP = 27 + 6 = 33

Answer 2

Answer:

please mark it as a brainliest answer

and follow me