If the value of n = 1 then f (x) = x1 is differentiate as d (f (x)) / d x = d x1 / d x = 3 x (1 – 1) = 3 x 0 If the value of n = 6 then f (x) = x6 is differentiate as d (f (x)) / d x = d x6 / d x = 3 x (6 – 1) = 3 x 5. If the value of n = 3 then f (x) = x3 is differentiate as d (f (x)) / d x = d x3 / d x = 3 x (3 – 1) = 3 x 2. Rational numbers on number line = 3 *1 = 3.