यदि (f(x)=x-2) और (g(x)=\frac{1}{x}) हैं, तो ((fg)(x)=x) का हल-समुच्चय क्या है?

If (f(x)=x-2) and (g(x)=\frac{1}{x}), what is the solution set of ((fg)(x)=x)?

Explanation opens after your attempt
Correct Answer

A. \( \mathbb{R}-{0} \)

Step 1

Concept

((fg)(x)=x-2\cdot\frac{1}{x}=x), but (x=0) is not in the domain. Hence every non-zero real number is a solution.

Step 2

Why this answer is correct

The correct answer is A. \( \mathbb{R}-{0} \). ((fg)(x)=x-2\cdot\frac{1}{x}=x), but (x=0) is not in the domain. Hence every non-zero real number is a solution.

Step 3

Exam Tip

((fg)(x)=x-2\cdot\frac{1}{x}=x), पर (x=0) डोमेन में नहीं है। अतः हर अशून्य वास्तविक संख्या हल है।

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Mathematics Answer, Explanation and Revision Hints

यदि (f(x)=x-2) और (g(x)=\frac{1}{x}) हैं, तो ((fg)(x)=x) का हल-समुच्चय क्या है? / If (f(x)=x-2) and (g(x)=\frac{1}{x}), what is the solution set of ((fg)(x)=x)?

Correct Answer: A. \( \mathbb{R}-{0} \). Explanation: ((fg)(x)=x-2\cdot\frac{1}{x}=x), पर (x=0) डोमेन में नहीं है। अतः हर अशून्य वास्तविक संख्या हल है। / ((fg)(x)=x-2\cdot\frac{1}{x}=x), but (x=0) is not in the domain. Hence every non-zero real number is a solution.

Which concept should I revise for this Mathematics MCQ?

((fg)(x)=x-2\cdot\frac{1}{x}=x), but (x=0) is not in the domain. Hence every non-zero real number is a solution.

What exam hint can help solve this Mathematics question?

((fg)(x)=x-2\cdot\frac{1}{x}=x), पर (x=0) डोमेन में नहीं है। अतः हर अशून्य वास्तविक संख्या हल है।