Write the Series in Summation Notation $$1 + 2 + 3 + 4 + 5$$

Multiple Choice

Write the series in summation notation. $$1 + 2 + 3 + 4 + 5$$

A) $\sum _ { j = 1 } ^ { 5 } j$
B) $\sum _ { j = 1 } ^ { 5 } 1$
C) $\sum _ { j = 5 } ^ { 1 } j$
D) $\sum _ { j = 1 } ^ { 1 } 5$