Question

PLEASE HELP! TRYING TO COMPLETE WITHIN 30 MINS

in an arithmetic sequence, a1 = 2x + 1, a2 = x + 11, and a3 = 4x + 5
how would i format the sequence? (or if it's easier, what is the r value?) i keep struggling with forming the proper one

Answer 1

Explanation:

In an AP, 2a2 = a1 + a3.

=> 2(x + 11) = (2x + 1) + (4x + 5)

=> 2x + 22 = 6x + 6

=> 4x = 16

=> x = 4.