f(x)=-3x+2
A(a,b)
|a|=|b|
Caz 1
a=b
f(a)=b, adica f(a)=a
-3a+2=a
2=4a
[tex]a=\frac{1}{2}[/tex]
[tex]f(\frac{1}{2} )=-\frac{3}{2} +2=\frac{1}{2}[/tex]
[tex]A(\frac{1}{2} ,\frac{1}{2} )[/tex]
Caz 2
a=-b sau -a=b
f(a)=b
Adica f(a)=-a
-3a+2=-a
2=2a
a=1
f(1)=-3+2=-1
A(1,-1)
