SSC CGL 6 Sep 2016 Paper

© examsiri.com

Question : 66 of 100

Marks: +1, -0

If x +

1/x

= 2 , then the value of

x^2+2/x^6

is equal to ?

0
1
2
3

Solution:

x +

1/2

= 2
⇒

x^2

+ 1 = 2x ⇒

x^2

- 2x + 1 = 0
⇒

(x-1)^2

= 0 ⇒ x - 1 = 0
⇒ x = 1
∴

x^7 + 2/x^6

= 1 + 2 = 3

© examsiri.com

Go to Question:

Prev Question

Next Question