Question

dada a função f(x)= 8x+15 calcule: f (2) -f (3)

Answer 1

f(x) = 8x + 15

f(2) = 8 . 2 + 15

f(2) = 16 + 15

f(2) = 31

f(3) = 8 . 3 + 15

f(3) = 24 + 15

f(3) = 39

f(2) - f(3) = 31 - 39 = - 8