2) a) f(m)= 5, 2m-3=5, 2m= 8, m= 4
b) f(m)=5, 4-m= 5, m= -1
c) f(m)= 5, m^2-m-1= 0
∆= 1+4= 5, m1= (1+√5)/2, m2= (1-√5)/2
3) daca graficul functie intersecteaza axa OX, inseamna ca y= 0, unde y= f(x)
a) 2x-9= 0, x= 9/2, deci punctul de intersectie are coordonatele (9/2, 0)
b) g(x)=0, 9-3x= 0, x= 3, deci punctul de intersectie are coordonatele (3, 0)
4) daca graficul functie intersecteaza axa OY, inseamna ca x= 0, unde
a) f(x)= x+√2, f(0)= 0+√2=√2, punctul de intersectie are coordonatele (0, √2)
b) g(x)=6x+3/4, g(0)=6*0+3/4=3/4, deci punctul de intersectie are coordonatele (0, 3/4)
