यदि (f(x)=x-2-1) और (g(x)=x-2+1) हों, तो ((fg)(x)) क्या है?
If (f(x)=x-2-1) and (g(x)=x-2+1), what is ((fg)(x))?
Explanation opens after your attempt
A. \(x^4-1\)
Concept
(\(x^2-1\)\(x^2+1\)=x-4-1) by difference of squares. Recognizing the formula makes calculation faster.
Why this answer is correct
The correct answer is A. \(x^4-1\). (\(x^2-1\)\(x^2+1\)=x-4-1) by difference of squares. Recognizing the formula makes calculation faster.
Exam Tip
(\(x^2-1\)\(x^2+1\)=x-4-1) difference of squares से मिलता है। formula पहचानने से calculation तेज होती है।
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