[tex]\bold{Zad. 11}\\\\\text{Obliczenia w zalaczniku}\\\underline{Odp. A}[/tex]
[tex]\bold{Zad. 12}[/tex]
[tex]\text{Obliczenia w zalaczniku}\\\underline{Odp. A}[/tex]
[tex]\bold{Zad. 13}\\\\W(x)=ax^3+x^2-2x-1\\W(-0.5)=0\\0=a(-\frac12)^3+(-\frac12)^2-2*(-\frac12)-1\\0=-\frac18a+\frac14+1-1\\0=-\frac18a+\frac14\\\frac18a=\frac14/*8\\a=\frac84\\a=2\\\\\underline{Odp. A}[/tex]
