यदि (f(x)=x+1), (g(x)=x-1) और ((af+bg)(x)=5x+1), तो (a+b) क्या है?
If (f(x)=x+1), (g(x)=x-1), and ((af+bg)(x)=5x+1), what is (a+b)?
Explanation opens after your attempt
A. (5)
Concept
(af+bg=(a+b)x+(a-b)), so (a+b=5). In such questions, compare the coefficient of (x) directly.
Why this answer is correct
The correct answer is A. (5). (af+bg=(a+b)x+(a-b)), so (a+b=5). In such questions, compare the coefficient of (x) directly.
Exam Tip
(af+bg=(a+b)x+(a-b)), इसलिए (a+b=5)। ऐसे प्रश्न में (x) के गुणांक को सीधे मिलाएं।
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