यदि (f:\(0,\infty\)\to\mathbb{R}) तथा (f(x)=x+\frac{1}{x}) हो तो (f) एकैकी है या नहीं?

If (f:\(0,\infty\)\to\mathbb{R}) and (f(x)=x+\frac{1}{x}), is (f) one-one?

Explanation opens after your attempt
Correct Answer

A. नहींNo

Step 1

Concept

(f(2)=2+\frac{1}{2}=\frac{5}{2}).

Step 2

Why this answer is correct

(f\left\(\frac{1}{2}\right\)=\frac{1}{2}+2=\frac{5}{2}), while \(2\neq\frac{1}{2}\).

Step 3

Exam Tip

In functions involving (x) and \(\frac{1}{x}\), check reciprocal pairs carefully. चरण 1: (f(2)=2+\frac{1}{2}=\frac{5}{2}) है। चरण 2: (f\left\(\frac{1}{2}\right\)=\frac{1}{2}+2=\frac{5}{2}) है जबकि \(2\neq\frac{1}{2}\)। चरण 3: (x) और \(\frac{1}{x}\) वाले फलनों में ऐसे युग्म ध्यान से देखें।

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Mathematics Answer, Explanation and Revision Hints

यदि (f:\(0,\infty\)\to\mathbb{R}) तथा (f(x)=x+\frac{1}{x}) हो तो (f) एकैकी है या नहीं? / If (f:\(0,\infty\)\to\mathbb{R}) and (f(x)=x+\frac{1}{x}), is (f) one-one?

Correct Answer: A. नहीं / No. Explanation: चरण 1: (f(2)=2+\frac{1}{2}=\frac{5}{2}) है। चरण 2: (f\left\(\frac{1}{2}\right\)=\frac{1}{2}+2=\frac{5}{2}) है जबकि \(2\neq\frac{1}{2}\)। चरण 3: (x) और \(\frac{1}{x}\) वाले फलनों में ऐसे युग्म ध्यान से देखें। / Step 1: (f(2)=2+\frac{1}{2}=\frac{5}{2}). Step 2: (f\left\(\frac{1}{2}\right\)=\frac{1}{2}+2=\frac{5}{2}), while \(2\neq\frac{1}{2}\). Step 3: In functions involving (x) and \(\frac{1}{x}\), check reciprocal pairs carefully.

Which concept should I revise for this Mathematics MCQ?

(f(2)=2+\frac{1}{2}=\frac{5}{2}).

What exam hint can help solve this Mathematics question?

In functions involving (x) and \(\frac{1}{x}\), check reciprocal pairs carefully. चरण 1: (f(2)=2+\frac{1}{2}=\frac{5}{2}) है। चरण 2: (f\left\(\frac{1}{2}\right\)=\frac{1}{2}+2=\frac{5}{2}) है जबकि \(2\neq\frac{1}{2}\)। चरण 3: (x) और \(\frac{1}{x}\) वाले फलनों में ऐसे युग्म ध्यान से देखें।