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Question

Circles x2+y22x4y=0 and x2+y28y4=0


A

Touch each other internally

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B

Touch each other externally

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C

Cuts each other at two points

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D

One circle lies inside the other

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Solution

The correct option is A

Touch each other internally


C1(1,2),C2(0,4),R1=5,R2=25

C1C2=5 and C1C2=|R2R1|

Hence circles touch internally.


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