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Which point is on the circle described by (x  2)2 + (y + 3)2 = 4?
 one year ago
 one year ago
Which point is on the circle described by (x  2)2 + (y + 3)2 = 4?
 one year ago
 one year ago

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pooja195Best ResponseYou've already chosen the best response.0
xa)^2+(yb)^2=R^2 is the point M(a,b) and the radius of this circle is R (x – 2)^2 + (y + 3)^2 = 17 the center of this circle is A(2,3)and the center of the circle (x – 5)^2 + y^2 = 32 is B(5,0) The line (D): y=ax+b which passes through A and B is such that A belongs to (D) ==> 3=a(2)+b=2a+b ==> b=2a3(*) B belongs to (D) ==> 0=a(5)+b=5a+b ==>b=5a(**) (*) and (**) lead to 5a=2a3 ==> 5a2a3=0 ==> 3a3=0 ==>3a=3 ==> a=3/3=1 ==> a=1 From (**) b=5a=5(1)=5 Finally the equation of (D) is y=x5
 one year ago

DirectrixBest ResponseYou've already chosen the best response.0
This (when x=0 y= 3) is the yintercept of the circle.
 one year ago

VinayakvivekBest ResponseYou've already chosen the best response.0
dw:1363582218886:dw
 one year ago
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