यदि (f(x)=x+4) और (g(x)=2x-1) हों, तो ((f+g)(x)=(fg)(x)) के लिए कौन-सा समीकरण बनेगा?
If (f(x)=x+4) and (g(x)=2x-1), which equation is formed for ((f+g)(x)=(fg)(x))?
Explanation opens after your attempt
B. \(2x^2+7x-4=3x+3\)
Concept
((f+g)(x)=3x+3) and ((fg)(x)=(x+4)(2x-1)=2x-2+7x-4). Write both sides separately first.
Why this answer is correct
The correct answer is B. \(2x^2+7x-4=3x+3\). ((f+g)(x)=3x+3) and ((fg)(x)=(x+4)(2x-1)=2x-2+7x-4). Write both sides separately first.
Exam Tip
((f+g)(x)=3x+3) और ((fg)(x)=(x+4)(2x-1)=2x-2+7x-4)। पहले दोनों पक्ष अलग लिखें।
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