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Some Maths problems

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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Reply 1
Avatar for elpaw
elpaw
15
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?
Reply 2
Avatar for fishpaste
fishpaste
OP
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.
Reply 3
Avatar for theone
theone
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.
Reply 4
Avatar for fishpaste
fishpaste
OP
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?
Reply 5
Avatar for GH
GH
13
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
Reply 6
Avatar for theone
theone
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.
Reply 7
Avatar for elpaw
elpaw
15
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
Reply 8
Avatar for GH
GH
13
elpaw

doesnt work
Reply 9
Avatar for GH
GH
13
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
Reply 10
Avatar for theone
theone
2776
make the avatar more manly, it looks like a girl if you scrunch your eyes up


Happy? :biggrin:
Reply 11
Avatar for elpaw
elpaw
15
2776
doesnt work

sorry, try http://users.ox.ac.uk/~chri1957/calculus.jpg
Reply 12
Avatar for GH
GH
13
elpaw

you keen keen person
Reply 13
Avatar for GH
GH
13
theone
Happy? :biggrin:

Its pretty good,
Reply 14
Avatar for elpaw
elpaw
15
2776
you keen keen person

what do you mean by that? you're not going to turn into LH?
Reply 15
Avatar for theone
theone
2776
Its pretty good,


Thank you :smile:
Reply 16
Avatar for elpaw
elpaw
15
theone
Thank you :smile:

egan will like you.
Reply 17
Avatar for GH
GH
13
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
Reply 18
Avatar for elpaw
elpaw
15
2776
whats this about LH?I dont quite get the connection

he made a long bitchy thread about vienna being too keen.
Reply 19
Avatar for GH
GH
13
elpaw
he made a long bitchy 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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