यदि (x=3) पर \(kx^2-4x-6\) का मान (9) है, तो (k) क्या होगा?
If the value of \(kx^2-4x-6\) at (x=3) is (9), what is (k)?
Explanation opens after your attempt
B. (3)
Concept
Substitution gives (9k-12-6=9). Therefore (9k=27) and (k=3).
Why this answer is correct
The correct answer is B. (3). Substitution gives (9k-12-6=9). Therefore (9k=27) and (k=3).
Exam Tip
मान रखने पर (9k-12-6=9) मिलता है। इसलिए (9k=27) और (k=3)।
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