Mathematics

Problem

Consider

r(x)=\dfrac{(x^{2}-4x+3)(x-2)}{(x-1)(x-2)(x-3)}

. Which of the following lists all

x

-values at which the graph of

r

has a removable discontinuity? a)

x=2

only b)

x=1,2,3

c) No removable discontinuities; the function is continuous for all real

x

x=1

and

x=3