Ukryta treść:
*delta w obu przypadkach \(\displaystyle{ (t, l)}\)jest dodatnia zatem te równania mają po jednym pierwiastku
\(\displaystyle{ x^3-3x^2+5x-17=0}\)
\(\displaystyle{ (x-1)^3+2(x-1)-14=0}\)
\(\displaystyle{ t=x-1}\)
\(\displaystyle{ t^3+2t-14=0}\)
\(\displaystyle{ t= \sqrt[3]{ \frac{14}{2} + \sqrt{ \frac{196}{4} + \frac{8}{27}} } - \sqrt[3]{- \frac{14}{2} + \sqrt{ \frac{196}{4} + \frac{8}{27}} }}\)
\(\displaystyle{ y^3-3y^2+5y+11=0}\)
\(\displaystyle{ (y-1)^3+2(y-1)+14=0}\)
\(\displaystyle{ l=y-1}\)
\(\displaystyle{ l^3+2l+14=0}\)
\(\displaystyle{ l= \sqrt[3]{ -\frac{14}{2} + \sqrt{ \frac{196}{4} + \frac{8}{27}} } - \sqrt[3]{+ \frac{14}{2} + \sqrt{ \frac{196}{4} + \frac{8}{27}} }}\)
\(\displaystyle{ x+y=t+1+l+1}\)
\(\displaystyle{ x+y=2}\)
\(\displaystyle{ x^3-3x^2+5x-17=0}\)
\(\displaystyle{ (x-1)^3+2(x-1)-14=0}\)
\(\displaystyle{ t=x-1}\)
\(\displaystyle{ t^3+2t-14=0}\)
\(\displaystyle{ t= \sqrt[3]{ \frac{14}{2} + \sqrt{ \frac{196}{4} + \frac{8}{27}} } - \sqrt[3]{- \frac{14}{2} + \sqrt{ \frac{196}{4} + \frac{8}{27}} }}\)
\(\displaystyle{ y^3-3y^2+5y+11=0}\)
\(\displaystyle{ (y-1)^3+2(y-1)+14=0}\)
\(\displaystyle{ l=y-1}\)
\(\displaystyle{ l^3+2l+14=0}\)
\(\displaystyle{ l= \sqrt[3]{ -\frac{14}{2} + \sqrt{ \frac{196}{4} + \frac{8}{27}} } - \sqrt[3]{+ \frac{14}{2} + \sqrt{ \frac{196}{4} + \frac{8}{27}} }}\)
\(\displaystyle{ x+y=t+1+l+1}\)
\(\displaystyle{ x+y=2}\)