Răspuns :
f(x)=x-7supra2
f(x) =x-7/2
[tex]\it f(x)=x-\dfrac{7}{2} [/tex]
f(x) =0 ⇔ x- 7/2=0 ⇔ x = 7/2
f(x) =x-7/2
[tex]\it f(x)=x-\dfrac{7}{2} [/tex]
f(x) =0 ⇔ x- 7/2=0 ⇔ x = 7/2