Question

помагити алгибра пажалуста

an=n+1/n+3

Answer 1

$\displaystyle\bf\\a_{n} =\frac{n+1}{n+3} \\\\\\a_{5} =\frac{5+1}{5+3} =\frac{6}{8} =\frac{3}{4} \\\\\\Otvet \ : \ C)$