Question

Lae x-1,x-4 and x-7 are in ap then find x

Answer 1

if they are in AP and also satisfies the condition 2b = (a+c)/2

that is 2x–8 = 2x–8

then it means x can be any integers.

for example x can be 1,–1,2,-2,0,3,–3,4,–4 etc......