यदि \(3x^2+kx+12=0\) में मूलों का गुणनफल मूलों के योग का (-2) गुना है, तो (k) क्या होगा?
If in \(3x^2+kx+12=0\), the product of roots is (-2) times the sum of roots, what is (k)?
Explanation opens after your attempt
Correct Answer
A. (6)
Concept
The product is (4) and the sum is \(-\frac{k}{3}\). From (4=-2\left\(-\frac{k}{3}\right\)), we get (k=6).
Why this answer is correct
The correct answer is A. (6). The product is (4) and the sum is \(-\frac{k}{3}\). From (4=-2\left\(-\frac{k}{3}\right\)), we get (k=6).
Exam Tip
गुणनफल (4) और योग \(-\frac{k}{3}\) है। (4=-2\left\(-\frac{k}{3}\right\)) से (k=6) मिलता है।
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