Is that supposed to be
[tex] f(x) = x \cdot |-1|^x[/tex]
?
Let's assume so. This is really bad computer aided instruction if they can't typeset simple formulas in a way that doesn't look like it was written by a drunk. Tell your school to get a better system than this; you deserve better.
[tex]f(2) = 2 \cdot |-1|^2 = 2 \cdot 1^2 = 2\cdot 1 = 2[/tex]
Answer: 2, last choice
