f:R->R is given by f(x)=3x. Inverse of f - CUETMOCK

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Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Relations and Functions

Question:

f:R->R is given by f(x)=3x. Inverse of f is

Options:

3x

x-3

x/3

None of the above

Correct Answer:

x/3

Explanation:

Let g=f^-1(x).g(f(y))=g(3y)=y. Let 3y=x. y=x/3. hence g(x)=x/3.

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