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Forum: Competition Questions
Welcome to the Competition Questions forum!
For discussing problems from mathematics competitions.

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a fun problem 2 by perucho on 2004-05-14 01:55:18
Will exist a pair of numbers from 1 to 100, one of which is a power and the other is prime, whose sum is a power and its product has all the equal digits?


[ reply | up ]
checkin answers by Abdul_Q_Y on 2004-05-03 07:15:31


Evaluate teh following limits. Do not use a calculator. Write infinity and (negaative) infinity when appropriate

 (1) lim as x goes to infinty (e^x + 3) / (489.x^2 + 6)
 (2) lim as x goes to 1 (x^3 - 3x + 2) / (x^2 - 1)
 (3) lim as x goes to 0+ (1 / sin x) - (1 / x)
[ reply | up ]
How does Cauchy's inequality work? by caroline on 2004-04-21 22:48:23
cauchy's inequality is supposed to be:

(xy^3+yz^3+zx^3)(z+x+y) *is greater than or equal to* xyz(y+z+x)^2.

i don't get what it's supposed to be used for, and how it works. it just confuses me. please help!!!

thanks!!!

[ reply | up ]
help!!! by caroline on 2004-03-30 23:21:11
somebody was telling me about roots of unity but i dont know what it is!!!
my highest math level is geom so please be nice in explaning

[ reply | up ]
Math. enabled pages by wamilola on 2003-12-11 17:04:48

Math. enabled pages available for free at:

http://www.mathyards.com/vb

Regards,
[ reply | up ]

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