Is there any way to solve
Besides trial and error? I can't figure it out!
Thanks in advance!
I have taken the liberty of "texing" your question. If I have it wrong, that is your fault USE THE TEX FACILITY IN FUTURE

Is there any way to solve
Besides trial and error? I can't figure it out!
Thanks in advance!
I have taken the liberty of "texing" your question. If I have it wrong, that is your fault USE THE TEX FACILITY IN FUTURE
Thanks! But how do you computeOriginally Posted by DrRocket
?
Basically the same way you compute that 27/9=3. There you invert multiplication. Here you invert !Originally Posted by m84uily
Didn't you learn your factorial tables when you learned the multiplication tables as a kid ?
No, I hadn't.Originally Posted by DrRocket
So this would have to be something that comes from memory rather than something like:
?
More likeOriginally Posted by m84uily
leads to
So
leads to
Doesn't everybody do this in their head ? At least for ?
I went to school during the Reagan era, so consequently I wasn't even exposed to the concept of factorials(!), much less exposed to a table of such. I only learned of factorials about two years ago.
It should be fairly easy to construct a factorial table. From there I might be able to spot a pattern that might lead to an algorithm for extrapolating the factorial base of a number. Or, I could just use Google, "formula for extrapolating factorial base", but that wouldn't be much fun.
Yeah, I just wanted to know how to do it for larger numbers, maybe I should have started by inquiring about that. Sorry!Originally Posted by DrRocket
I sure don't.Originally Posted by DrRocket
One thing you can do to solve for n! = Blah, is to divide "Blah" by 1, 2, 3, etc, until you get 1.Originally Posted by GiantEvil
So, it's easy to solve for n! = Blah, but I wouldn't be able to do it just by glancing at it.
It is considerably easier if you have a calculator with a factorial function built in. :DOriginally Posted by salsaonline
I can't believe I didn't figure that out for myself.Originally Posted by salsaonline
I went so far as to construct a factorial table to 16! Then I factored the 16! down to 2^15,3^6,5^3,7^2,11 and 13.
I randomly picked 9! and got 2^7,3^4,5 and 7.
I didn't see any pattern yet so I quit for the moment.
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