Question

1
3. Ifx + 1/x= 2, then x3 +1/x3
is equal to-
х
3
(A) 64
(C) 8
(B) 14
(D) 2

Answer 1

Answer:

(D) 2

Step-by-step explanation:

x+1/x = 2

x+1 = 2x

2x-x = 1

x = 1

Then

x^3+1/x^3

= 1^3+1/1^3

= 1+1

= 2