Question

1.Dada a função f(x) = -2x + 3, determine:
a)f(1)
b)f(3)
c)f(5)
d)f(21)
e)f(12)
f)f(8/2)
g)f(x)=0
h)f(x)=13
i)f(x)=-23​

Answer 1

Explicação passo-a-passo:

f(x)= - 2x+3

a) f(1)= -2.1+3= -2+3= +1

b)f(3)= -2.3+3= -6+3= -3

c)f(5)= -2.5+3= -10+3= -7

d)f(21)= -2.21+3= -42+3= -39

e)f(12)= -2.12+3= -24+3=-21

f) f(8/2)=f(4)= -2.4+3= -8+3= -5

g)0= -2x+3

2x=3

x=3/2

h)13= -2x+3

2x= -13+3

2x= -10

x= -10/2

x= -5

i)-23= -2x+3

2x= 3+23

2x= 26

x= 26/2

x= 13