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Conic Sections
Standard Equations And Simple Properties Of A Parabola
Class 11 Mathematics - Conic Sections - Standard equations and simple properties of a Parabola Expert Quiz
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परवलय \(y=(x+2)^2-7\) की सममिति-अक्ष क्या है?
What is the axis of symmetry of the parabola \(y=(x+2)^2-7\)?
#graphs
#quadratic functions
#axis of symmetry
#vertex form
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A \(x=-2\)
B \(x=2\)
C \(y=-7\)
D \(y=7\)
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Correct Answer
A. \(x=-2\)
Explanation
Simple Explanation
शीर्ष-रूप \(y=(x-h)^2+k\) में परवलय की सममिति-अक्ष \(x=h\) होती है। यहाँ \(y=(x-(-2))^2-7\), इसलिए \(h=-2\) और सममिति-अक्ष \(x=-2\) है। \(y=-7\) शीर्ष का y-निर्देशांक है, सममिति-अक्ष नहीं। परीक्षा-टिप: कोष्ठक के भीतर \(x\) के साथ लिखे पद का चिह्न उलटकर \(h\) पहचानें। / For a parabola in vertex form \(y=(x-h)^2+k\), the axis of symmetry is \(x=h\). Here, \(y=(x-(-2))^2-7\), so \(h=-2\), giving the axis \(x=-2\). The value \(y=-7\) is the vertex's y-coordinate, not the axis of symmetry. Exam tip: reverse the sign of the constant appearing with \(x\) inside the square to identify \(h\).
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