Question

Sendo f(x)= -2x +2, calcule a função quando for:
A- f(x)= -2
B- f(x)= 1
C- f(x)= 0
D- f(x)= -1
E- f(x)= 1/2​

Answer 1

Resposta

a) x=2

b) x=0.5

c) x=1

d) x=1.5

e) x=$\frac{1.5}{2}$

Explicação

a) y=-2x+2

-2=-2x+2

2x=4

2x=4

x=2

b) y=-2x+2

1=-2x+2

2x=1

2x=1

x=0.5

c) y=-2x+2

0=-2x+2

2x=2

2x=2

x=1

d) y=-2x+2

-1=-2x+2

2x=3

2x=3

x=1.5

e) y=-2x+2

$\frac{1}{2}$=-2x+2

2x=$\frac{2}{1}$-$\frac{1}{2}$

2x=$\frac{2}{1}$-$\frac{1}{2}$

2x=2-0.5

2x=1.5

x=$\frac{1.5}{2}$   ou    x=0.75