फलन (f(x)=x-2-2|x|) के ग्राफ का न्यूनतम मान क्या है?
What is the minimum value of the graph of (f(x)=x-2-2|x|)?
Explanation opens after your attempt
A. (-1)
Concept
Let \(t=|x|\ge0\), then (f=t-2-2t=(t-1)2-1). In exams, use (|x|) as a new variable to find the minimum.
Why this answer is correct
The correct answer is A. (-1). Let \(t=|x|\ge0\), then (f=t-2-2t=(t-1)2-1). In exams, use (|x|) as a new variable to find the minimum.
Exam Tip
मान लें \(t=|x|\ge0\) तब (f=t-2-2t=(t-1)2-1) है। परीक्षा में (|x|) को नए चर की तरह लेकर न्यूनतम निकालें।
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