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Questions  

For the two circles x2+y2=16 and x2+y22y=0 there is/are 

a
one pair of common tangent
b
two pairs of common tangents
c
three common tangents
d
no common tangents

detailed solution

Correct option is D

The circle x2+y2−2y=0 is completely within x2+y2=16 Hence, there is no common tangent.

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