The two circles x2 + у^2 = ax and x2 + у^2= c^2(c > 0) touch each ot – InterviewSolution

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1.	The two circles x2 + у^2 = ax and x2 + у^2= c^2(c > 0) touch each other if :(1) 2lal =c(4) lal =2c(2) lal =c(3) a=2c
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