यदि \(g:\mathbb{R}\to\mathbb{R}\) एकैकी है और \(f:\mathbb{R}\to\mathbb{R}\), (f(x)=g(2x-3)), तो (f) के बारे में सही कथन क्या है?
If \(g:\mathbb{R}\to\mathbb{R}\) is one-one and \(f:\mathbb{R}\to\mathbb{R}\), (f(x)=g(2x-3)), what is the correct statement about (f)?
Explanation opens after your attempt
A. (f) एकैकी है(f) is one-one
Concept
(f(a)=f(b)) मानें। / Assume (f(a)=f(b)).
Why this answer is correct
(g(2a-3)=g(2b-3)) और (g) एकैकी है, इसलिए (2a-3=2b-3)। / Then (g(2a-3)=g(2b-3)), and since (g) is one-one, (2a-3=2b-3).
Exam Tip
इससे (a=b) मिलता है, अतः (f) एकैकी है। / This gives (a=b), so (f) is one-one.
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