Answer
Just substitute $b_j$ by the index, starting from 1, because the sequence is defined for $j\geq1$, substitute the values and calculate.
Work Step by Step
$J\geq$ 1:
$\begin{split}
b_j & = \frac{5 - j}{5 + j}\\
& \\
b_1 & = \frac{5 - 1}{5 + 1} = \frac{4}{6} = \frac{2}{3}\\
& \\
b_2 & = \frac{5 - 2}{5 + 2} = \frac{3}{7} \\
& \\
b_3 & = \frac{5 - 3}{5 + 3} = \frac{2}{8} = \frac{1}{4} \\
& \\
b_4 & = \frac{5 - 4}{5 + 4} = \frac{1}{9} \\
& \\
\end{split}$
