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
A. नहींNo
Concept
(f(2)=2+\frac{1}{2}=\frac{5}{2}).
Why this answer is correct
(f\left\(\frac{1}{2}\right\)=\frac{1}{2}+2=\frac{5}{2}), while \(2\neq\frac{1}{2}\).
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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