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 and explanation
A. नहींNo
Concept
\(f(2)=2+\frac{1}{2}=\frac{5}{2}\) है। / \(f(2)=2+\frac{1}{2}=\frac{5}{2}\).
Why this answer is correct
\(f\left(\frac{1}{2}\right)=\frac{1}{2}+2=\frac{5}{2}\) है जबकि \(2\neq\frac{1}{2}\)। / \(f\left(\frac{1}{2}\right)=\frac{1}{2}+2=\frac{5}{2}\), while \(2\neq\frac{1}{2}\).
Exam Tip
(x) और \(\frac{1}{x}\) वाले फलनों में ऐसे युग्म ध्यान से देखें। / In functions involving (x) and \(\frac{1}{x}\), check reciprocal pairs carefully.
Login to save your score, XP, coins and progress.
QR scan karne par isi question ka correct answer aur explanation khula hua milega.
Open answer link