यदि (f(x)=x-2+kx+1) और (g(x)=x-2-kx+1) हैं, तथा (f-g=6x), तो (k) क्या होगा?
If (f(x)=x-2+kx+1) and (g(x)=x-2-kx+1), and (f-g=6x), what is (k)?
Explanation opens after your attempt
A. (3)
Concept
(f-g=2kx), so (2k=6) and (k=3). Comparing coefficients is the fastest method in parameter questions.
Why this answer is correct
The correct answer is A. (3). (f-g=2kx), so (2k=6) and (k=3). Comparing coefficients is the fastest method in parameter questions.
Exam Tip
(f-g=2kx), अतः (2k=6) और (k=3)। गुणांक मिलाना पैरामीटर प्रश्नों में तेज तरीका है।
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