Question

Dada a funcao f(x) = 2x - 1, determine:

A) f(2)
B) f(-1)
C) f(1)
D) f(0)
E) f(1/2)

Answer 1

função : f(x) = 2x-1

Letra a : 

f(2) = 2.2 - 1
f(2) = 4 - 1
f(2) = 3

Letra b : 

f(-1) = 2.(-1) - 1
f(-1) = -2 - 1
f(-1) = -3

Letra c : 

f(1) = 2.1 - 1
f(1) = 2 - 1
f(1) = 1

Letra d : 

f(0) = 2.0 - 1
f(0) = 0 - 1
f(0) = -1

Letra e : 

f(1/2) = 2.(1/2) - 1
f(1/2) = 2/2 - 1
f(1/2) = 1 - 1
f(1/2) = 0