IB Mathematics Analysis and Approaches Quiz
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GEOMETRY AND TRIGONOMETRY
Question 1
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The line
y
=
2
x
+
c
y = 2x + c
y
=
2
x
+
c
is tangent to the circle
x
2
+
y
2
=
20
x^2 + y^2 = 20
x
2
+
y
2
=
20
. Find the possible values of
c
c
c
.
A
c
=
±
20
c = \pm \sqrt{20}
c
=
±
20
B
c
=
±
5
c = \pm 5
c
=
±
5
C
c
=
±
10
c = \pm 10
c
=
±
10
D
c
=
±
20
c = \pm 20
c
=
±
20
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