1.)
One can think of it till the cows come home or use the formula, but there is another cool way:
check it out:

Obvously the answer will be one over three, one third.
there is another picture:

So there is another question:
2.)
But I can't think of one in a geometrical way.
If you can, please tell me.
and there is another question:
3.)
what is the picture?

pretty obviously, the answer becomes one over eight
ok, let us think of another question:
4.)
Why some of could them be easily found, but some else we hardly had any idea?
So what is the trick?
what is in commen between 1.) and 3.) ? and what else is in common between 2.) and 4.)?
2 comments:
If you want to type formula, why don't you try Wordpress? They support LaTex.
See Terry Tao's blog for example: http://terrytao.wordpress.com/
Oh yeah!
Thanks for the great recommendation!
that's really kinda troublesome to type it in Mathbin and upload it to Blogger.
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