Question

$3p(p - q - r) + 20(q + r)$
please help me I will mark you as brainlist​

Answer 1

Answer:

p−1,p+3,3p−1 are in A.P.

∴2(p+3)=p−1+3p−1

⇒2p+6=4p−2

⇒2p=8

∴p=4