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Question Number 176948 by mathlove last updated on 28/Sep/22

Commented by mr W last updated on 28/Sep/22

what do mean with 9!!!! and 8!!!!!?  can you tell a source where those  notations are commonly defined?

$${what}\:{do}\:{mean}\:{with}\:\mathrm{9}!!!!\:{and}\:\mathrm{8}!!!!!? \\ $$$${can}\:{you}\:{tell}\:{a}\:{source}\:{where}\:{those} \\ $$$${notations}\:{are}\:{commonly}\:{defined}? \\ $$

Commented by mathlove last updated on 28/Sep/22

four and five timese facturial

$${four}\:{and}\:{five}\:{timese}\:{facturial} \\ $$

Answered by BaliramKumar last updated on 28/Sep/22

!5×(((!4+8!!!!!+6!!−16 ))^(1/4) /(9!!!!))  44×(((9+8×3+6×4×2−16))^(1/4) /(9×5×1))  44×(((65))^(1/4) /(45))

$$!\mathrm{5}×\frac{\sqrt[{\mathrm{4}}]{!\mathrm{4}+\mathrm{8}!!!!!+\mathrm{6}!!−\mathrm{16}\:}}{\mathrm{9}!!!!} \\ $$$$\mathrm{44}×\frac{\sqrt[{\mathrm{4}}]{\mathrm{9}+\mathrm{8}×\mathrm{3}+\mathrm{6}×\mathrm{4}×\mathrm{2}−\mathrm{16}}}{\mathrm{9}×\mathrm{5}×\mathrm{1}} \\ $$$$\mathrm{44}×\frac{\sqrt[{\mathrm{4}}]{\mathrm{65}}}{\mathrm{45}} \\ $$

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