Question

Find the Value of (x + 1)/(x^3)
If (x + 1)/(x^2) = 3, then (x + 1)/(x^3) = ?

Answer 1

x + 1 = 3 x^2
3x^2 - x - 1 = 0

x = [1 +- √13]/6

from  (1)    3 x² = (x+1)

 so  (x+1)/x³ =  3/x  = 18 /[ 1+- √13]   = -3 [1 +- √13 ]/2