यदि (f(x)=\frac{1}{x-2-4}) और (g(x)=x+2) हों, तो ((fg)(x)) का डोमेन क्या है?
If (f(x)=\frac{1}{x-2-4}) and (g(x)=x+2), what is the domain of ((fg)(x))?
Explanation opens after your attempt
A. \(\mathbb{R}-{-2,2}\)
Concept
(x-2-4=(x-2)(x+2)), so \(x\ne 2,-2\). Even if cancellation appears after multiplication, do not forget the original domain.
Why this answer is correct
The correct answer is A. \(\mathbb{R}-{-2,2}\). (x-2-4=(x-2)(x+2)), so \(x\ne 2,-2\). Even if cancellation appears after multiplication, do not forget the original domain.
Exam Tip
(x-2-4=(x-2)(x+2)), इसलिए \(x\ne 2,-2\)। गुणा के बाद कटाव दिखे तो भी मूल डोमेन न भूलें।
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