# Math Help - gamma function

1. ## gamma function

So I got a) to be 4!

for b) do I use the same mathod, i.e gamma(n + 1) = n! ?

2. For (b), use the fact that $\Gamma(r+1) = r\Gamma(r)$. (So for example $\Gamma\bigl(\tfrac{12}5\bigr) = \tfrac75\Gamma\bigl(\tfrac75\bigr) = \ldots$.)

For (c), use the same method, starting with the fact that $\Gamma\bigl(\tfrac12\bigr) = \sqrt\pi$.

3. Originally Posted by math_help

So I got a) to be 4! Mr F says: Correct.

for b) do I use the same mathod, i.e gamma(n + 1) = n! ?
b) Use $\Gamma (z + 1) = z \Gamma (z)$.

c) Several approaches are possible eg. Use $\Gamma (z + 1) = z \Gamma (z)$ and $\Gamma \left( \frac{1}{2} \right) = \sqrt{\pi}$.

4. thankyou, makes it very simple now!