Odpowiedź:
a) [tex]a_7 = \frac{2*7 + 1}{7 +2}[/tex] = [tex]\frac{15}{9}[/tex] = [tex]\frac{5}{3}[/tex]
[tex]a_{10} = \frac{2*10 + 1}{10 + 2}[/tex] = [tex]\frac{21}{12}[/tex] = [tex]\frac{7}{4}[/tex]
[tex]a_3 = \frac{2*3 + 1}{3 + 2}[/tex] = [tex]\frac{7}{5}[/tex]
b) [tex]a_7 = (-1)^7 +2*7 = - 1 + 14 = 13[/tex]
[tex]a_{10} = (-1)^{10} + 2*10 = 1 + 20 = 21[/tex]
[tex]a_3 = (-1)^3 + 2*3 = - 1 + 6 = 5[/tex]
Szczegółowe wyjaśnienie:
