Question

1- dada a função afim f(x)= -2x+3 determine

A) f(1)

B) f(0)

C) f(1/3)

D) f(-1/2)

Answer 1

f(x)= -2x+3

a) f(1)
f(1)= -2.1+3
f(1) = -2 +3
f(1) = +1

b) f(0)
f(x)= -2x+3 
f(0) = -2.0 + 3
f(0) = 0 +3
f(0) = 3 

c) f(1/3)
f(x)= -2x+3
f(1/3) = -2.1/3 + 3
f(1/3) = -2/3 +3   mmc 3
f(1/3) = 1.-2/3 +1.3/3
f(1/3) = -2/3 + 3/3
f(1/3) = -2 +3/3
f(1/3) = 1/3

d) F(-1/2) =
f(x)= -2x+3
f(-1/2) = -2.-1/2 + 3
f(-1/2) = 2/2 +3
f(-1/2) = 1 + 3
f(-1/2) = 4