For an arithmetic sequence $\left\{ a _ { n } \right\}$ $$a _ { 1 } + a _ { 2 } = 10 , \quad a _ { 3 } + a _ { 4 } + a _ { 5 } = 45$$ When this holds, what is the value of $a _ { 10 }$? [2 points] (1) 47 (2) 45 (3) 43 (4) 41 (5) 39
For an arithmetic sequence $\left\{ a _ { n } \right\}$
$$a _ { 1 } + a _ { 2 } = 10 , \quad a _ { 3 } + a _ { 4 } + a _ { 5 } = 45$$
When this holds, what is the value of $a _ { 10 }$? [2 points]\\
(1) 47\\
(2) 45\\
(3) 43\\
(4) 41\\
(5) 39