Question

Dada a função f(x) = 3x + 1, calcule:

a) f(1)
b) f(-2)
c) f (-5)
d) f(2)

Answer 1

a) f(x) = 3.1+1 = 4

b) f(x) = 3(-2)+1 = -5

c) f(x) = 3(-5)+1 = -14

d) f(x) = 3.2+1 = 7

Answer 2

f(x ) = 3x + 1

a) f(1)

3 • 1 + 1

3 + 1

4

b) f(-2)

3 • ( - 2) + 1

- 6 + 1

- 5

c) f (-5)

3 • ( - 5) + 1

- 15 + 1

- 14

d) f(2)

3 • 2 + 1

6 + 1

7