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A parabola y=a x^2+b x+c crosses the x-a...

A parabola `y=a x^2+b x+c` crosses the x-axis at `(alpha,0)(beta,0)` both to the right of the origin. A circle also passes through these two points. The length of a tangent from the origin to the circle is: (a) `sqrt((b c)/a)` (b) `a c^2` (c) b/a (d) `sqrt(c/a)`

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CENGAGE PUBLICATION-CONIC SECTIONS-All Questions
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  3. A parabola y=a x^2+b x+c crosses the x-axis at (alpha,0)(beta,0) both ...

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  4. From a point on the circle x^2+y^2=a^2 , two tangents are drawn to the...

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  5. Prove that the line joining the orthocentre to the centroid of a tr...

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  13. Show that the common tangents to the parabola y^2=4x and the circle x^...

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  14. Consider a curve C : y^2-8x-2y-15=0 in which two tangents T1a n dT2 ar...

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