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![[Post New]](/templates/default/images/icon_minipost_new.gif) 17 Apr 2008 21:12:21 IST
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the eqn for circles touching x axis at origin is x^2+y^2-2ky=0--(1)
differentiate this eqn with res to x and find the value of k
substitute its value in the first eqn..(1)
u'll get the ans
x^2-y^2-2xy/(dy/dx)=0
please correct me if i am wrong..
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