यदि (f(x)=x-2) और (g(x)=2x) हों, तो ((f+g)(x)) का minimum value क्या है?
If (f(x)=x-2) and (g(x)=2x), what is the minimum value of ((f+g)(x))?
Explanation opens after your attempt
Correct Answer
A. (-1)
Concept
((f+g)(x)=x-2+2x=(x+1)2-1), so the minimum value is (-1). Completing the square helps find the minimum of a quadratic.
Why this answer is correct
The correct answer is A. (-1). ((f+g)(x)=x-2+2x=(x+1)2-1), so the minimum value is (-1). Completing the square helps find the minimum of a quadratic.
Exam Tip
((f+g)(x)=x-2+2x=(x+1)2-1), इसलिए minimum value (-1) है। complete square से quadratic का minimum आसानी से मिलता है।
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