यदि (f(x)=x-2+4) और (g(x)=4x) हैं, तो ((f-g)(x)\ge 0) किसके लिए सत्य है?
If (f(x)=x-2+4) and (g(x)=4x), for which (x) is ((f-g)(x)\ge 0) true?
Explanation opens after your attempt
A. सभी \(x\in\mathbb{R}\)all \(x\in\mathbb{R}\)
Concept
((f-g)(x)=x-2-4x+4=(x-2)2), which is always non-negative. A perfect square is never negative.
Why this answer is correct
The correct answer is A. सभी \(x\in\mathbb{R}\) / all \(x\in\mathbb{R}\). ((f-g)(x)=x-2-4x+4=(x-2)2), which is always non-negative. A perfect square is never negative.
Exam Tip
((f-g)(x)=x-2-4x+4=(x-2)2), जो हमेशा अऋण है। पूर्ण वर्ग कभी ऋणात्मक नहीं होता।
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