Question

dada a função f(x) = 3x +1 calcule : f(4) - f(-2)

Answer 1

f(x) = 3x + 1

f(4) = 3.4 + 1
f(4) = 12 + 1
f(4) = 13

f(-2) = 3.(-2) + 1
f(-2) = -6 + 1
f(-2) = -5

f(4) - f(-2)

13 - ( -5 )

13 + 5 = 18