RS Aggarwal - Mathematics

Book: RS Aggarwal - Mathematics

Chapter: 3. Functions

Subject: Maths - Class 11th

Q. No. 18 of Exercise 3F

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18

If = for all x ϵ R – {0} then write an expression for f(x).

Given, =


Let y = x +


xy = + 1


-xy + 1 =0


X=


X=


f(y) = ()


f(y) = ((


f(y) = – 2.


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