If (f(x)=x^2-1) and (g(x)=x^2+1), what is ((fg)(x))?यदि (f(x)=x^2-1) और (g(x)=x^2+1) हों, तो ((fg)(x)) क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (x^4-1)(x^4-1)
((x^2-1)(x^2+1)=x^4-1) by difference of squares. Recognizing the formula makes calculation faster.((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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