यदि \(f:R\to R\), (f(x)=x-3-7), तो (f^{-1}(x)) क्या होगा?
If \(f:R\to R\), (f(x)=x-3-7), what is (f^{-1}(x))?
Explanation opens after your attempt
A. \(\sqrt[3]{x+7}\)
Concept
Write \(y=x^3-7\).
Why this answer is correct
Then \(x^3=y+7\), so \(x=\sqrt[3]{y+7}\).
Exam Tip
Replacing (y) by (x), (f^{-1}(x)=\sqrt[3]{x+7}). चरण 1: \(y=x^3-7\) लिखें। चरण 2: \(x^3=y+7\), इसलिए \(x=\sqrt[3]{y+7}\)। चरण 3: (y) को (x) से बदलने पर (f^{-1}(x)=\sqrt[3]{x+7})।
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