यदि (f(x)=2x-2-1) और (g(x)=x-2+3) हों, तो ((f-g)(x)>0) कब होगा?
If (f(x)=2x-2-1) and (g(x)=x-2+3), when is ((f-g)(x)>0)?
Explanation opens after your attempt
A. (x<-2) या (x>2)(x<-2) or (x>2)
Concept
((f-g)(x)=x-2-4), so \(x^2-4>0\) gives (|x|>2). A number line is useful for quadratic inequalities.
Why this answer is correct
The correct answer is A. (x<-2) या (x>2) / (x<-2) or (x>2). ((f-g)(x)=x-2-4), so \(x^2-4>0\) gives (|x|>2). A number line is useful for quadratic inequalities.
Exam Tip
((f-g)(x)=x-2-4), इसलिए \(x^2-4>0\) से (|x|>2)। द्विघात असमिका में संख्या रेखा उपयोगी है।
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