यदि (f(x)=x-2-4) और (g(x)=|x|-2) हैं, तो (f-g) का मान (0) किन (x) पर होगा?
If (f(x)=x-2-4) and (g(x)=|x|-2), for which (x) is (f-g=0)?
Explanation opens after your attempt
A. (x=-1,2)
Concept
The equation (x-2-4-(|x|-2)=0) gives \(x^2-|x|-2=0\). Solving by cases gives (x=-1,2).
Why this answer is correct
The correct answer is A. (x=-1,2). The equation (x-2-4-(|x|-2)=0) gives \(x^2-|x|-2=0\). Solving by cases gives (x=-1,2).
Exam Tip
समीकरण (x-2-4-(|x|-2)=0) से \(x^2-|x|-2=0\) मिलता है। (t=|x|) रखने पर (t=2) नहीं, बल्कि सीधे केस से (x=-1,2) मिलते हैं।
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