$$a _ { 1 } \frac { - 3 } { 21 } + \frac { - 2 } { 7 }$$
$\frac{-a_{1}-2}{7}$
$$a_{1}\left(-\frac{1}{7}\right)+\frac{-2}{7}$$
$$a_{1}\left(-\frac{1}{7}\right)-\frac{2}{7}$$
Show Solution
Hide Solution
$$\frac{-a_{1}-2}{7}$$
