Question

Dada a função F(x)=-3x+2, calcule:
F(-1)
F(1)+F(3)
F(x)=0

Answer 1

f(1)-3(1)+2=>
f(1) -1


f((3)-3(3)+2=>
f(3) -7

f(1)+f(3)=>
-1+(-7)=>-8


f(x)=0
f(x) -3x+2=0
-3x=-2. (*-1)
3x=2
/3=/3
x=2/3

Answer 2

y= -3.-1+2
y=5  para f(-1)
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y=-3.1+2
y=-1 para f(1)

y=-3.3+2=-7  para f(3)

entao f(1)+f(3) =-1-7=-8
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-3x+2 =0 
3x=2
x=2/3 quando f(x)=0