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The value of ' m ' for which y=mx+6 is a...

The value of ' m ' for which `y=mx+6` is a tangent to the hyperbola `x^2/100-y^2/49 =1 ` is :

A

`sqrt((17)/(20))`

B

`sqrt((20)/(17))`

C

`sqrt((3)/(20))`

D

`sqrt((20)/(3))`

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The correct Answer is:
A
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