यदि (f(x)=\frac{2x}{x-1}), तो इस फलन का परास कौन-सा है?
If (f(x)=\frac{2x}{x-1}), what is the range of this function?
Explanation opens after your attempt
A. (R-{2})
Concept
Write \(y=\frac{2x}{x-1}\).
Why this answer is correct
From (y(x-1)=2x), we get \(x=\frac{y}{y-2}\), if \(y\ne2\).
Exam Tip
Hence every real (y) is possible except (2). चरण 1: \(y=\frac{2x}{x-1}\) लिखें। चरण 2: (y(x-1)=2x) से \(x=\frac{y}{y-2}\), यदि \(y\ne2\)। चरण 3: इसलिए हर वास्तविक (y) संभव है, केवल (2) नहीं।
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