Question

Dada a funçao f(x)=2x-3 calcular:
a) f(0)
b) f(3)
c) f(-1)
d)f(1/2)

2 sendo f(x)=-4x+5 determine:
a) f(0)
b) f(2)
c) f(-5/4)
d) f(-3)

Answer 1

Resposta:

(1)

a)y=-3

b)y= 3

c)y=-1

d)y=-2

(2)

a)5

b)-3

c)10

d)17

Explicação passo-a-passo:

(1)

f(x)=2x-3

f(0)= 2.0 -3

y= -3

f(3)= 2.3 - 3

y= 6 - 3

y= 3

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

y=2 - 3

y= -1

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

y=2/2 -3

y=2/2 - 6/2

y= -4/2

y= -2

(2)

f(x)=-4x+5

f(0)= -4.0 + 5

y= 5

f(2)=-4.2 +5

y=-8 +5

y= -3

f(-5/4)=-4.-5/4 +5

y=20/4 + 5

y= 5 + 5

y= 10

f(-3)=-4.-3 +5

y= 12 + 5

y= 17