If x – 10 = 4 , then

If x – 10 = 4 , then 

If x – 10 = 4 , then 

(a)          4

(b)          5

(c)           2 √2

(d)          4 √2

Sol:

Let y = x – 1 = 9 + 4 √5

and 1/y=1/x-1=9-4√5

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