Question:
Solution:
Consider the following functions:
[tex]f(x)\text{ = 2x}[/tex]
[tex]g(x)\text{ = I x + 6 I}[/tex]
then, the multiplication of the above functions is:
[tex](f.g)(x)\text{ = f(x) . g(x)}[/tex]
this is equivalent to:
[tex]f(x).g(x)\text{ =2x . I x + 6 I}[/tex]
then, evaluating the previous function at x = -3, we obtain:
[tex]f.g(-3)\text{ =2(-3). I -3 + 6 I = -6. I 3 I = }-6\text{ . 3 = -18}[/tex]
then, the correct answer is:
[tex]f.g(-3)\text{ = -18}[/tex]
