Question

for the A. p. n-1, n-2, n-3. find am​

Answer 1

Step-by-step explanation:

given terms are n-1, n-2, n-3.

If a, b, c are in AP, then AM is b = (a + c) / 2

=> 2(n-2) = (n-1) + (n-3)

=> 2n - 4 = 2n - 4