Question

dada a função F(x) = 5x-3. Calcule:.
a) f(3).


b) f(6) - f(5).


c) f(10) + f(4)

Answer 1

a) f(3)
f(x) = 5x - 3
f(3) = 5×3 - 3
f(3) = 15 - 3
f(3) = 12

b) f(6) - f(5)
f(x) = 5x - 3
f(6) = 5×6 - 3
f(6) = 30 - 3
f(6) = 27

f(x) = 5x - 3
f(5) = 5×5 - 3
f(5) = 25 - 3
f(5) = 22

f(6) - f(5) = 27 - 22 = 5

c) f(10) + f(4)
f(x) = 5x - 3
f(10) = 5×10 - 3
f(10) = 50 - 3
f(10) = 47

f(x) = 5x - 3
f(4) = 5×4 - 3
f(4) = 20 - 3
f(4) = 17

f(10) + f(4) = 47 + 17 = 64