Let f be the function defined by f (x) = 4x + 8. Find f (1), f (- 1), f (a), f (- a), and f (a + 1).
A) f (1) = 11, f (- 1) = 5, f (a) = 4a + 8, f(- a) = - 4a + 8
B) f (1) = 10, f (- 1) = 6, f (a) = 12, f(- a) = 4, f (a + 1) = 4a + 12
C) f (1) = 12, f (- 1) = 4, f (a) = a + 8, f(- a) = - a + 8, f (a + 1) = 4a + -4
D) f (1) = 12, f (- 1) = 4, f (a) = 4a + 8, f(- a) = - 4a + 8, f (a + 1) = 4a + 12
E) f (1) = 12, f (- 1) = 4, f (a) = 4a + 8, f(- a) = 4, f (a + 1) = 4a + 8

Question

Quizplus · Accepted Answer

- f(1) = 4(1) + 8 = 12
- f(-1) = 4(-1) + 8 = 4
- f(a) = 4a + 8 (given in the function definition)
- f(-a) = 4(-a) + 8 = -4a + 8
- f(a+1) = 4(a+1) + 8 = 4a + 12.

Therefore, the correct choice is D, with all the options matching the correct answers.

Let F Be the Function Defined by F (X) =