Odpowiedź :
[tex]a_1=162\\\\a_2=-54\\\\q=\frac{a_2}{a_1}\\\\q=\frac{-54}{162}\\\\q=-\frac{1}{3}\\\\a_7=a_1q^6\\\\a_7=162\cdot(-\frac{1}{3})^6=162\cdot\frac{1}{729}=\frac{2}{9}[/tex]
[tex]a_1=162\\\\a_2=-54\\\\q=\frac{a_2}{a_1}\\\\q=\frac{-54}{162}\\\\q=-\frac{1}{3}\\\\a_7=a_1q^6\\\\a_7=162\cdot(-\frac{1}{3})^6=162\cdot\frac{1}{729}=\frac{2}{9}[/tex]