show that the circle touches the -axis

I found the radius to be

is there a problem with this question?

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- September 25th 2010, 07:34 AMPunchProve
show that the circle touches the -axis

I found the radius to be

is there a problem with this question? - September 25th 2010, 08:00 AMArchie Meade
- September 25th 2010, 08:01 AMTraveller
If the circle touches the y-axis at some point, then for that point x = 0. Substitute this value of x in the given equation and solve for y to get a solution in reals.

- September 25th 2010, 08:10 AMArchie Meade
- September 25th 2010, 08:40 AMTraveller