Question

if (x+1/x)=2 then (x³+1/x³) is equal to :

Answer 1

Solution:

(x+1/x)³ = (x³+1/x³ +3(x+ 1/x)
Putting the value of X+1/X = 2

(2)³ = x³ +1/x³ +3(2)

8 = x³ +1/x³ +6

x³ +1/x³ = 8-6

x³ +1/x³ = 2

Hope it's helpful