Find the value of x,given that x+1,2x and 2x+3 are consecutive tems of a linear sequence
using your definition of an arithmetic (linear) sequence ....
2x + 3 - 2x = 2x - (x+1)
3 = x-1
x = 4
check:
the terms would be
5, 8, and 11 , which do form a linear sequence