यदि (p(x)=x-2-4x-1) है, तो \(\frac{1}{\alpha}+\frac{1}{\beta}\) क्या है, जहाँ \(\alpha\) और \(\beta\) इसके शून्यक हैं?
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Correct Answer
A. (-4)
Concept
\(\alpha+\beta=4\) and \(\alpha\beta=-1\), so \(\frac{1}{\alpha}+\frac{1}{\beta}=\frac{4}{-1}=-4\). Find sum and product first.
Why this answer is correct
The correct answer is A. (-4). \(\alpha+\beta=4\) and \(\alpha\beta=-1\), so \(\frac{1}{\alpha}+\frac{1}{\beta}=\frac{4}{-1}=-4\). Find sum and product first.
Exam Tip
\(\alpha+\beta=4\) और \(\alpha\beta=-1\), इसलिए \(\frac{1}{\alpha}+\frac{1}{\beta}=\frac{4}{-1}=-4\)। पहले योग और गुणनफल निकालें।
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