Question

seja f: R --> a função definida por f(x) = 3x + 4. Determine

a) f(5)

b) f(-2)

Answer 1

f(5) = 3.5 +4
f(5) = 15+4
f(5) = 19

f(-2) = 3.(-2) + 4
f(-2) = -6+4
f(-2) = -2

Answer 2

f(x) = 3x + 4

A) f(5)

f(5) = 3 • 5 + 4

f(5) = 15 + 4

f(5) = 19

B) f(- 2)

f(-2) = 3 • ( - 2) + 4

f(- 2) = - 6 + 4

f(-2) = - 2