Question

if p_1,p+3,3p_1 are in ap then find the value of p​

Answer 1

Consider, If a, b & c are in AP, then we can say that b = (a + c)/2.

Given:

a = p - 1
b = p + 3
c = 3p - 1

p + 3 = (p - 1 + 3p - 1)/2

p + 3 = (4p - 2)/2

p + 3 = 2p - 1

p = 4 ——> Answer