Verified answer

Explicação passo-a-passo:

faça a tabela da função:

a) f(x) = x²-2

x = 0

y= 0²-2

y = -2

x = 1

y= 1²-2

y = 1-2

y= -1

y = x² -2

y = x² -2

x = 2

y = 2²-2

y = 4-2

y = 2

y = x²-2

x= -1

y = (-1)² -2

y = 1-2

y = -1

x | y

-1 | -1

0 | -2

1 | -1

2 | 2

__________

b) g(x) = 2x

x = 1

y = 2.1

y= 2

x = 0

y = 2.0

y = 0

y = 2x

x = -1

y= 2.(-1)

y = -2

y = 2x

x = -2

y = 2.(-2)

y = -4

x | y

1 | 2

0 | 0

-1 | -2

-2 | -4