What is the value of 2f(1)+f(-1)-f(-3)?
Answer Choices:
1.) 8
2.) 9
3.) 0
4.) None of these

Answer:
2.) 9
Step-by-step explanation:
f(1) = 3; 2 f(1) = 2 * 3 = 6
f(- 1) = 3
f(- 3) = 0
2f(1)+f(-1)-f(-3) = 6 + 3 - 0 = 9