यदि (f(x)=\frac{2x-2+3}{x-2+1}), तो (f) का परिसर क्या है?
If (f(x)=\frac{2x-2+3}{x-2+1}), what is the range of (f)?
Explanation opens after your attempt
A. ((2,3])
Concept
Let \(t=x^2\ge 0\), then \(f=\frac{2t+3}{t+1}\) is decreasing. At (t=0), (3) is obtained and (2) is not attained.
Why this answer is correct
The correct answer is A. ((2,3]). Let \(t=x^2\ge 0\), then \(f=\frac{2t+3}{t+1}\) is decreasing. At (t=0), (3) is obtained and (2) is not attained.
Exam Tip
मान लें \(t=x^2\ge 0\), तब \(f=\frac{2t+3}{t+1}\) घटता है। (t=0) पर (3) मिलता है और (2) प्राप्त नहीं होता।
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