Question

if the numbers (x-2)(4x-1)(5x+2)are in A.P find x.​

Answer 1

a=x-2. d=3x+1 =x+3 (we get these but sub a2-a1 and a3-a2 repectiveily )

so 3x-x=3-1

2x=2 hence your answer is x=1 hope this will help u

or there is another method

let's take d=3x+1 a=x-2 and n =3

a

A3=a+(n-1)d

a

on substitution we get the same