Question

Seja f(y) = 5.y – b; determine f(2.b) – f(b-1).

ME AJUDEM PFV

Answer 1

f(y) = 5.y – b

f(2.b):

f(2.b) = 5(2.b) – b

f(2.b) = 10b - b

f(2.b) = 9b.

f(b-1):

f(b-1) = 5.(b - 1) - b

f(b-1) = 5b - 5 - b

f(b-1) = 4b - 5.

f(2.b) – f(b-1):

(9b) - (4b - 5) =

9b - 4b + 5 =

f(2.b) – f(b-1) = 5b + 5.

Att, Felipemlvr.