Question

18) Considere função f(x) = 4x - 1 e determine:
a) f(2) + f(-3) =
b) f(-4) - f(5) =​

Answer 1

F(x)= 4x-1

F(2)= 4.2-1

F(2)=8-1=7

F(-3)= 4(-3) -1

F(-3)= -12-1= -13

F(-4)= 4(-4)-1

F(-4)= -16 -1

F(-4)= -17

F(5)= 4.5 -1

F(5)= 20 -1

F(5)= 19

Logo:

a) 7+(-13)=

7-13 = -6

b) -17 -(+19)=

-17 -19 = -34