Question

02- Dada a função f(x) = - 3x - 2 , calcule:

a) f(-1) + f(3)

b) f(0) . f(-4)

c) f(-2) - f(1)​

Answer 1

Resposta:

a) f(-1) + f(3)

f(-1) = - 3. (-1) - 2

f(-1) = 1

f(3) = - 3. 3 - 2

f(3) = -11

f(-1) + f(3)

1 + (-11) = -10

b) f(0) . f(-4)

f(0) = - 3. 0 - 2

f(0) = -2

f(x) = - 3x - 2

f(-4) = - 3. (-4) - 2

f(-4) = 10

f(0) . f(-4)

-2 . 10 = -20

c) f(-2) - f(1)​

f(x) = - 3x - 2

f(-2) = - 3. -2 - 2

f(-2) = 4

f(x) = - 3x - 2

f(1) = - 3. 1 - 2

f(1) = -5

f(-2) - f(1)​

4 - (-5) = 9