Question and Answers Forum

All Questions      Topic List

Algebra Questions

Previous in All Question      Next in All Question      

Previous in Algebra      Next in Algebra      

Question Number 91195 by student work last updated on 28/Apr/20

$$\mathrm{what}\mathrm{is}\mathrm{the}\mathrm{duble}\mathrm{fictorial}\mathrm{furmolla}?$$

Answered by MJS last updated on 28/Apr/20

$$n!!=\{\begin{array}{l}\underset{k=1}{\prod ^{\frac{n}{2}}}\left(2k\right)\mathrm{for}\mathrm{even}n\\ \underset{k=1}{\prod ^{\frac{n+1}{2}}}(2k-1)\mathrm{for}\mathrm{uneven}n\end{array}$$$$0!!=1$$$$\mathrm{for}n⩾1:n!=n!!(n-1)!!$$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com