Ifx – 1/ x = 5, then x^2 + 1 /x^2 is :

RRB NTPC Mains or Stage 2 Model Paper 7 with solutions

Question : 39 of 120

Marks: +1, -0

x – 1/ x = 5

, then

x^2 + 1 /x^2

is :

Solution:

(c)

x –1/x= 5

On squaring both sides,

x^2 + 1/x^2– 2 = 25

⇒x^2 + 1/x^2= 27

Go to Question:

Prev Question

Next Question