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If the line hx + kx = 1 touches x^(2) ...

If the line `hx + kx = 1 ` touches ` x^(2) + y^(2) = a^(2)`, then he locus of the point (h, k) is a circle of radius

A

a

B

`(1)/(a)`

C

`sqrt(a)`

D

`(1)/(sqrt(a))`

Text Solution

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The correct Answer is:
B
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