Question

If x + 1/x = 5 , then sqrt(x) + 1/(sqrt(x)) is equal to

(1) sqrt(5)
(2)sqrt(3)
(3)sqrt(7)
(4)sqrt[3sqrt(3)]​

Answer 1

Step-by-step explanation:

x+1/x=a then x²+1/x²= a²-2

let √x+1/√x =a

then,

x+1/x= a²-2

5= a²-2

7= a²

√7= a

√7= √x+1/√x

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