यदि (f(x)=x+4) और (g(x)=4-x) हैं, तो ((fg)(x)) किसके बराबर है?
If (f(x)=x+4) and (g(x)=4-x), what is ((fg)(x)) equal to?
Explanation opens after your attempt
A. \(16-x^2\)
Concept
((fg)(x)=(x+4)(4-x)=16-x-2). View it as ((4+x)(4-x)).
Why this answer is correct
The correct answer is A. \(16-x^2\). ((fg)(x)=(x+4)(4-x)=16-x-2). View it as ((4+x)(4-x)).
Exam Tip
((fg)(x)=(x+4)(4-x)=16-x-2)। इसे ((4+x)(4-x)) के रूप में देखें।
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