How many lines are tangent to both of the circles  x2 + y2 = 4  and  x2 + (y − 3)2 = 1?   At what points do these tangent lines touch the circles? (Enter your answers from smallest to largest x-value.)

Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
Publisher:Ron Larson
Chapter6: Topics In Analytic Geometry
Section6.2: Introduction To Conics: parabolas
Problem 4ECP: Find an equation of the tangent line to the parabola y=3x2 at the point 1,3.
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How many lines are tangent to both of the circles 

x2 + y2 = 4

 and 

x2 + (y − 3)2 = 1?
 
At what points do these tangent lines touch the circles? (Enter your answers from smallest to largest x-value.)
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