in my book i have $\displaystyle \left(\begin{array}{cc}s\\2\end{array}\right)$ where s = 0.4
In my book the answer is -0.12 but i have no idea how they have got this, any help please?
look here, but note that when i try it one of the integrals isnt converging...im using matlab.
Binomial coefficient - Wikipedia, the free encyclopedia
Maybe without resorting to the Gamma function and what not, they're talking about the "generalized" binomial coefficient which we see used in binomial series:
$\displaystyle {a \choose k} = \frac{a(a-1)(a-2)\cdots(a - k+1)}{k!}$ where $\displaystyle a$ can be complex.
Hence: $\displaystyle {0.4 \choose 2} = \frac{(0.4)(0.4-1)}{2!}$