यदि (f(x)=x+2) और (g(x)=x-5) हैं, तो ((fg)(x)) क्या है?
If (f(x)=x+2) and (g(x)=x-5), what is ((fg)(x))?
Explanation opens after your attempt
A. \(x^2-3x-10\)
Concept
((fg)(x)=f(x)g(x)=(x+2)(x-5)=x-2-3x-10). After expanding, combine like terms.
Why this answer is correct
The correct answer is A. \(x^2-3x-10\). ((fg)(x)=f(x)g(x)=(x+2)(x-5)=x-2-3x-10). After expanding, combine like terms.
Exam Tip
((fg)(x)=f(x)g(x)=(x+2)(x-5)=x-2-3x-10)। गुणा में विस्तार के बाद समान पद मिलाएँ।
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