1. Consider the function f : R9 to R defined as follows. For each vector a =
(a1; a2; : : : ; a9) in R9, let f(a) be the 3 by 3 determinant
a1 a2 a3
a4 a5 a6
a7 a8 a9
:
Is f a continuous function from R9 to R; why or why not?
please explain the concept to me!