यदि \(\alpha\) और \(\beta\) समीकरण \(3x^2-4x-4=0\) के मूल हैं तो \(\frac{1}{\alpha}+\frac{1}{\beta}\) का मान क्या है?
If \(\alpha\) and \(\beta\) are roots of \(3x^2-4x-4=0\), what is the value of \(\frac{1}{\alpha}+\frac{1}{\beta}\)?
Explanation opens after your attempt
A. (-1)
Concept
Here \(\alpha+\beta=\frac{4}{3}\) and \(\alpha\beta=-\frac{4}{3}\). Therefore \(\frac{1}{\alpha}+\frac{1}{\beta}=\frac{\alpha+\beta}{\alpha\beta}=-1\).
Why this answer is correct
The correct answer is A. (-1). Here \(\alpha+\beta=\frac{4}{3}\) and \(\alpha\beta=-\frac{4}{3}\). Therefore \(\frac{1}{\alpha}+\frac{1}{\beta}=\frac{\alpha+\beta}{\alpha\beta}=-1\).
Exam Tip
यहां \(\alpha+\beta=\frac{4}{3}\) और \(\alpha\beta=-\frac{4}{3}\) है। इसलिए \(\frac{1}{\alpha}+\frac{1}{\beta}=\frac{\alpha+\beta}{\alpha\beta}=-1\) होगा।
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