Question

4) Seja a função f(x) = 2x –5, calcule:
a) f(2) b) f(3)
c) f(0)
d) f(-5) e) f(-7)

5) Seja a função g(x) = x2-2x + 3
a) g(2) b) g(3)
c) g(0)
d) g(-5) e) g(-7)​

Answer 1

Explicação passo-a-passo:

1)

a)f(2)=2.2-5=4-5=-1

b)f(3)=2.3-5=6-5=1

c)f(0)=2.0-5=0-5=-5

d)f(-5)=2.(-5)-5=-10-5=-15

e)f(-7)=2.(-7)-5=-14-5=-19

2)

g(×)=x²-2x+3

a)g(2) =(2)²-2.2+3=4-4+3=0+3=3

b)g(3)=(3)²-2.3+3=9-6+3=3+3=6

c)g(0)=0²-2.0+3=0-0+3=3

d)g(-5)=(-5)²-2.5+3=25-10+3=15+3=18

e)g(-7)=(-7)²-2.7+3=49-14+3=38