यदि (f(x)=2x+1) और (g(x)=3x-4) हों, तो ((fg)(-1)) क्या है?
If (f(x)=2x+1) and (g(x)=3x-4), what is ((fg)(-1))?
Explanation opens after your attempt
A. (7)
Concept
(f(-1)=-1) and (g(-1)=-7), so the product is (7). The product of two negative numbers is positive.
Why this answer is correct
The correct answer is A. (7). (f(-1)=-1) and (g(-1)=-7), so the product is (7). The product of two negative numbers is positive.
Exam Tip
(f(-1)=-1) और (g(-1)=-7), इसलिए गुणनफल (7) है। दो ऋणात्मक संख्याओं का गुणन धनात्मक होता है।
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