Question

Dada a função f (x)= -2×+3, calcule.

a)f(1)=3 b) f(x)=1 c)(x)= -7 d)f(x)=0

Answer 1

 f (x)= -2×+3, calcule.

a)f(1)=3  ==> -2(1)+3 = 3 ==> -2+3 = 3 ==> 1 = 3 F
 
b) f(x)=1 ==> -2×+3 = 3 => -2x = +3 - 3 ==> -2x = 0(-1)=> 2X = 0 ==> X = 0 

c)(x)= -7 ==> -2×+3 = -7 => -2x = - 7 - 3 => -2x = -10(-1)=> 2X = 10 => X = 5 

d)f(x)=0 ==> -2×+3 = 0 => -2x = 0 - 3 ==> -2x = -3(-1)=> 2X = 3 ==> X = 3/2 

Answer 2

Dada a função f (x)= -2×+3, calcule.

a)f(1)=3

-2x+3=3

-2x=3-3

-2x=0

x=0/-2

x=0

b) f(x)=1

-2x+3=1

-2x=1-3

-2x=-2

x=-2/-2

x=1

c)(x)= -7

-2x+3=-7

-2x=-7-3

-2x=-10

x=-10/-2

x=5



d)f(x)=0

-2x+3=0

-2x=-3

x=-3/-2

x=3/2

espero ter ajudado!

boa noite!