[tex]1.\ x+1=\frac{2-2x}{x-1}\\ (x+1)(x-1)=2-2x\\x^{2} -1=2-2x\\x^{2} +2x-3=0\\delta=2^{2}-4x1x(-3)}=4+12=16\\ \sqrt{delty}=4\\ x_{1}=\frac{-2-4 }{2}=-3\\ x_{2}=\frac{-2+4}{2}=1\geq \geq sprzeczne\ x\neq 1\\ \\ 2) V=\frac{1}{3}\pi r^{2}h \\ 3V=\pi r^{2}h \\ h=\frac{3V}{\pi r^{2} }[/tex]
