यदि \(f:\mathbb{R}\to\mathbb{R}\) को (f(x)=\frac{x-2+2x+5}{x-2+2x+2}) से दिया गया है, तो (f) का परिसर क्या है?
If \(f:\mathbb{R}\to\mathbb{R}\) is given by (f(x)=\frac{x-2+2x+5}{x-2+2x+2}), what is the range of (f)?
Explanation opens after your attempt
D. (\left\(1,\frac{5}{2}\right]\)
Concept
Here (x-2+2x+2=(x+1)2+1) and (f(x)=1+\frac{3}{(x+1)2+1}). The maximum is \(\frac{5}{2}\), and (1) is never attained.
Why this answer is correct
The correct answer is D. (\left\(1,\frac{5}{2}\right]\). Here (x-2+2x+2=(x+1)2+1) and (f(x)=1+\frac{3}{(x+1)2+1}). The maximum is \(\frac{5}{2}\), and (1) is never attained.
Exam Tip
(x-2+2x+2=(x+1)2+1) और (f(x)=1+\frac{3}{(x+1)2+1}) है। अधिकतम \(\frac{5}{2}\) मिलता है और (1) कभी नहीं मिलता।
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