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)?

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Correct Answer

B. (3)

Step 1

Concept

Substitution gives (9k-12-6=9). Therefore (9k=27) and (k=3).

Step 2

Why this answer is correct

The correct answer is B. (3). Substitution gives (9k-12-6=9). Therefore (9k=27) and (k=3).

Step 3

Exam Tip

मान रखने पर (9k-12-6=9) मिलता है। इसलिए (9k=27) और (k=3)।

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Mathematics Answer, Explanation and Revision Hints

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)?

Correct Answer: B. (3). Explanation: मान रखने पर (9k-12-6=9) मिलता है। इसलिए (9k=27) और (k=3)। / Substitution gives (9k-12-6=9). Therefore (9k=27) and (k=3).

Which concept should I revise for this Mathematics MCQ?

Substitution gives (9k-12-6=9). Therefore (9k=27) and (k=3).

What exam hint can help solve this Mathematics question?

मान रखने पर (9k-12-6=9) मिलता है। इसलिए (9k=27) और (k=3)।