1. a)
f(0)=3*0-3=-3 => f (0) = -3 A(0:-3)
f(1) = 3 *1-3 = 0 => f(1)=0 B(1;0)
b) Gf∩Gg= {M}
F(x)=g(x)
3x-3=1-x
4x=4
x=1
f(1)=0
g(1)=0
M(1;0)
2.
/=supra
*=inmultire
x=cantitatea initiala
x-20%x=4x/5 este cantitatea ramasa pentru vanzare
x*2=(4x/5)*y
4xy=10x
x(4y-10)=0
4y=10
y=2.5 lei/kg