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Let y^(2) = 4ax be a parabola and x^(...

Let `y^(2) = 4ax ` be a parabola and `x^(2) + y^(2) + 2bx = 0 ` be a circle . If the parabola and the circle touch each other externally , then _

A

`a gt 0 , b gt 0 `

B

`a gt 0 , b gt 0 `

C

`a lt 0 , b gt 0 `

D

`a lt 0 , b lt 0 `

Text Solution

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The correct Answer is:
A, D
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