Some Maths problems Watch

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fishpaste
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#1
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There are clearly people who are much more mathematically able than me on here, nevertheless, might be fun to exchange problems.

Something interesting from a P4 paper today, differentiate x.arcsin x, hence integrate arcsin x.
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elpaw
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(Original post by fishpaste)
There are clearly people who are much more mathematically able than me on here, nevertheless, might be fun to exchange problems.

Something interesting from a P4 paper today, differentiate x.arcsin x, hence integrate arcsin x.
'hence' meaning using your answer to the first part?
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fishpaste
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(Original post by elpaw)
'hence' meaning using your answer to the first part?
Yes, because it can be done by a 1 * arcsin x dx integration, but this way is more interesting.
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theone
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(Original post by fishpaste)
There are clearly people who are much more mathematically able than me on here, nevertheless, might be fun to exchange problems.

Something interesting from a P4 paper today, differentiate x.arcsin x, hence integrate arcsin x.
Here's an interesting one:

In a group of 6 people, show that there must be 3 people who know each other or don't know each other.
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fishpaste
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(Original post by theone)
Here's an interesting one:

In a group of 6 people, show that there must be 3 people who know each other or don't know each other.
Is that an "at least" 3 people, or exactly 3 people?
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GH
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(Original post by theone)
Here's an interesting one:

In a group of 6 people, show that there must be 3 people who know each other or don't know each other.
something about pigeon holeing

What is that avatar? it makes you look childish
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theone
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(Original post by 2776)
something about pigeon holeing

What is that avatar? it makes you look childish
I'm on a lookout for a better avatar at the moment thats actually 50x50!

And it's no such a simple problem, i mean exactly 3 people btw.
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elpaw
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(Original post by fishpaste)
There are clearly people who are much more mathematically able than me on here, nevertheless, might be fun to exchange problems.

Something interesting from a P4 paper today, differentiate x.arcsin x, hence integrate arcsin x.
answer here: http://users.ox.ac.uk/~chri1957/calculus.jpg
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GH
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(Original post by elpaw)
answer here: http://users.ox.ac.uk/chri1957/calculus.jpg
doesnt work
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GH
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(Original post by theone)
I'm on a lookout for a better avatar at the moment thats actually 50x50!

And it's no such a simple problem, i mean exactly 3 people btw.
make the avatar more manly, it looks like a girl if you scrunch your eyes up
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theone
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(Original post by 2776)
make the avatar more manly, it looks like a girl if you scrunch your eyes up
Happy?
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elpaw
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(Original post by 2776)
doesnt work
sorry, try http://users.ox.ac.uk/~chri1957/calculus.jpg
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GH
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(Original post by elpaw)
sorry, try http://users.ox.ac.uk/~chri1957/calculus.jpg
you keen keen person
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GH
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(Original post by theone)
Happy?
Its pretty good,
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elpaw
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(Original post by 2776)
you keen keen person
what do you mean by that? you're not going to turn into LH?
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theone
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(Original post by 2776)
Its pretty good,
Thank you
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elpaw
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#17
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(Original post by theone)
Thank you
egan will like you.
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GH
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#18
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(Original post by elpaw)
what do you mean by that? you're not going to turn into LH?
whats this about LH?I dont quite get the connection
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elpaw
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#19
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(Original post by 2776)
whats this about LH?I dont quite get the connection
he made a long *****y thread about vienna being too keen.
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GH
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(Original post by elpaw)
he made a long *****y thread about vienna being too keen.
Yes but this is different. You have actually took the time to write something down, scan it, upload it, then post it here. Too much work.
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