यदि \(\alpha,\beta\) समीकरण \(8x^2-31x+15=0\) के मूल हैं, तो \(\alpha+\beta\) क्या है?
If \(\alpha,\beta\) are roots of \(8x^2-31x+15=0\), what is \(\alpha+\beta\)?
Explanation opens after your attempt
Correct Answer
A. \( \frac{31}{8}\)
Concept
The sum of roots is \(-\frac{b}{a}=-\frac{-31}{8}=\frac{31}{8}\). In exams, keep the sign of (b) carefully.
Why this answer is correct
The correct answer is A. \( \frac{31}{8}\). The sum of roots is \(-\frac{b}{a}=-\frac{-31}{8}=\frac{31}{8}\). In exams, keep the sign of (b) carefully.
Exam Tip
मूलों का योग \(-\frac{b}{a}=-\frac{-31}{8}=\frac{31}{8}\) है। परीक्षा में (b) का चिन्ह ध्यान से रखें।
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