$$\sum _ { n = 4 } ^ { 9 } \left( \prod _ { k = 1 } ^ { n } \frac { k + 1 } { k } \right)$$ What is the result of this operation? A) 45 B) 48 C) 50 D) 52 E) 54
$$\sum _ { n = 4 } ^ { 9 } \left( \prod _ { k = 1 } ^ { n } \frac { k + 1 } { k } \right)$$
What is the result of this operation?
A) 45\\
B) 48\\
C) 50\\
D) 52\\
E) 54