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#1 Help Me ! » Challenge Question » 2008-09-22 16:21:02
- easilydoctor
- Replies: 1
Given a triangle ABC with side length a, b, and c. If
,what is the value of the angle
ACB?
Help me please! 
#2 Help Me ! » Final Exam Help! » 2007-12-17 21:11:35
- easilydoctor
- Replies: 2
∫[(5x²-3x+2)/√x]dx
∫[(sin5x)/(1+cos5x)²]dx
Can somebody quickly solve these for me please?
Also, is there an actual method in doing these besides intuitive trial and error?
Thanks a ∞!
#3 Help Me ! » Easy Challenge Problem You Can't Solve » 2007-12-03 17:04:06
- easilydoctor
- Replies: 1
This is easiest problem that you probably can't solve.
"Twenty coins are placed on the top of a table in a completely dark room so that exactly 13 of them have "heads" facing upward. You cannot see the coins to determine which coins are "heads", nor can you tell "heads from "tails" by touch. You are allowed to change the "head/tail" status of as many coins as you wish by flipping them. Explain how you can separate the coins into two piles and be guaranteed that each of the piles has the same number of "heads" facing upward."
#4 Re: Help Me ! » Need Your Help! » 2007-11-19 20:36:00
wow it took me about 1 hour to even realize that this was any relevance to my problem. I did it out like 10 times and I finally understand the first step! LOL THANKS A MILLION! You're a pure genius. =] 
#5 Help Me ! » Need Your Help! » 2007-11-18 13:56:38
- easilydoctor
- Replies: 2
I have lots of interesting riddles that my professor gives us for extra credit. Can anybody out there solve this week's puzzle?
" If the sum of the first n terms in the sequence a1, a2, a3, ... is equal to 1/n, find the product of its first 2007 terms. "
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