यदि \(f:\mathbb{R}\to\mathbb{R}\) और \(g:\mathbb{R}\to\mathbb{R}\) में (f(x)=2x+1), (g(x)=x-2-1), तो (\(f\circ g\)(x)) क्या है?
If \(f:\mathbb{R}\to\mathbb{R}\) and \(g:\mathbb{R}\to\mathbb{R}\) are given by (f(x)=2x+1), (g(x)=x-2-1), what is (\(f\circ g\)(x))?
Correct answer and explanation
A. \(2x^2-1\)
Concept
(\(f\circ g\)(x)=f(g(x))) होता है। / (\(f\circ g\)(x)=f(g(x))).
Why this answer is correct
(g(x)=x-2-1) को (f) में रखने पर (2\(x^2-1\)+1) मिलता है। / Substitute (g(x)=x-2-1) into (f) to get (2\(x^2-1\)+1).
Exam Tip
सरल करने पर \(2x^2-1\) आता है। / Simplifying gives \(2x^2-1\).
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