Write out the first five terms of the sequence.
-$$\left\{ \frac { ( 2 n - 1 ) ! } { n ! } \right\}$$
A) $2,6,40,1260,72,576$
B) $1,6,40,1260,72,576$
C) $2,3,20,210,3024$
D) $1,3,20,210,3024$

Question

Quizplus · Accepted Answer

The sequence is defined by the formula $\frac{(2n-1)!}{n!}$. Calculating the first five terms: For $n=1$, $\frac{(2*1-1)!}{1!} = 1$; for $n=2$, $\frac{(2*2-1)!}{2!} = 3$; for $n=3$, $\frac{(2*3-1)!}{3!} = 20$; for $n=4$, $\frac{(2*4-1)!}{4!} = 210$; for $n=5$, $\frac{(2*5-1)!}{5!} = 3024$.

Write Out the First Five Terms of the Sequence {(2n−1)!n!}\left\{ \frac { ( 2 n - 1 ) ! } { n ! } \right\}{n!(2n−1)!​}

Write Out the First Five Terms of the Sequence $\left\{ \frac { ( 2 n - 1 ) ! } { n ! } \right\}$