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tmua.fyi Paper 1 Challenge 2 · Q9

Paper 1Geometry

The line y=mx+1y=mx+1 is a tangent to the circle x2+y2−6x+8=0x^2+y^2-6x+8=0. What is the sum of the possible values of mm?

A−32-\frac32
B−1-1
C−34-\frac34
D−12-\frac12
E00
F34\frac34
G11
H32\frac32

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