Answer:
Step-by-step explanation:
Alright, lets get started.
The standard equation of a circle is :
[tex](x-a)^2+(y-b)^2=r^2[/tex]
Where (a,b) are center of circle and r is the radius of circle.
The first given equation is of only this format.
The first equation is : [tex]x^2+y^2=1[/tex]
It means the center (a,b) is equal to (0,0) and radius will equal to 1.
Second, [tex]x+y=2[/tex] is the equation of line.
Third , [tex]x^2+y^2=-1[/tex] the radius can not be negative.
Fourth, [tex](x-4)^2+(y-2)^2=0[/tex] the radius can not be zero.
Hence the only equation that degenerate circle is [tex]x^2+y^2=1[/tex] : Answer
Hope it will help :)
Answer:
The answer is (x-4)^2 + (y-2)^2 = 0
Step-by-step explanation:
I just took the test and it was right.
