यदि (f(x)=x-2+px+4) और (g(x)=2x+1) हों तथा ((f+g)(x)) का न्यूनतम मान (0) हो, तो (p) का मान क्या होगा?
If (f(x)=x-2+px+4) and (g(x)=2x+1), and the minimum value of ((f+g)(x)) is (0), what is (p)?
Explanation opens after your attempt
A. \(p=\pm2\sqrt{5}-2\)
Concept
For ((f+g)(x)=x-2+(p+2)x+5) to have minimum (0), its discriminant must be (0). Hence ((p+2)2=20).
Why this answer is correct
The correct answer is A. \(p=\pm2\sqrt{5}-2\). For ((f+g)(x)=x-2+(p+2)x+5) to have minimum (0), its discriminant must be (0). Hence ((p+2)2=20).
Exam Tip
((f+g)(x)=x-2+(p+2)x+5) का न्यूनतम (0) होने के लिए विविक्तकर (0) होगा। इसलिए ((p+2)2=20)।
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