Questions  

If A=[x, y: x2+y2=25] and B=x, y: x2+9y2=144, then AB contains

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a
One point
b
Three points
c
Two points
d
Four points
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detailed solution

Correct option is D

A=Set of all values (x,y): x2+y2=25=52B=x2144+y216=1 i.e., x2(12)2+y2(4)2=1Clearly, A∩B consists of four points.

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