यदि \(f:R\to R\), (f(x)=x-2-4), तो (f^{-1}({12})) क्या होगा?
If \(f:R\to R\), (f(x)=x-2-4), what is (f^{-1}({12}))?
Explanation opens after your attempt
A. ({-4,4})
Concept
For the preimage, solve \(x^2-4=12\).
Why this answer is correct
This gives \(x^2=16\).
Exam Tip
Hence (x=4) or (x=-4), so the preimage is ({-4,4}). चरण 1: पूर्वछवि के लिए \(x^2-4=12\) हल करें। चरण 2: इससे \(x^2=16\) मिलता है। चरण 3: इसलिए (x=4) या (x=-4), अतः पूर्वछवि ({-4,4}) है।
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