If a line y=mx+2y = mx + 2y=mx+2 is tangent to the circle x2+y2=1x^2 + y^2 = 1x2+y2=1, what can be said about mmm?
There is no real value of mmm
m=0m = 0m=0
∣m∣=1|m| = 1∣m∣=1
∣m∣=3|m| = \sqrt{3}∣m∣=3