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[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
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[phpBB Debug] PHP Warning: in file [ROOT]/latexrender/class.latexrender.php on line 237: fclose() expects parameter 1 to be resource, bool given
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[phpBB Debug] PHP Warning: in file [ROOT]/latexrender/class.latexrender.php on line 236: fputs() expects parameter 1 to be resource, bool given
[phpBB Debug] PHP Warning: in file [ROOT]/latexrender/class.latexrender.php on line 237: fclose() expects parameter 1 to be resource, bool given
[phpBB Debug] PHP Warning: in file [ROOT]/latexrender/class.latexrender.php on line 280: copy(356287ff10eba8171d78adb29e7af54e.png): failed to open stream: No such file or directory
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forum.virtualchallengemeets.com • View topic - Some Q's
Page 1 of 1

Some Q's

PostPosted: Tue Oct 27, 2009 11:56 am
by AnjaliB
1) xy=6
x-y=3
x^3-y^3=?

2) The hypotenuse of a right triangle with integral sides is 41 in. The shortest leg is ? in.

3) Fibonacci Sequence squared
ex.
1^2+1^2+2^2+3^2+5^2+8^2 =?

Re: Some Q's

PostPosted: Tue Oct 27, 2009 12:13 pm
by AuSmith
1) Use a nifty way of writing [unparseable or potentially dangerous latex formula]

2) Normally, they generate pythagorean triples by squaring an odd number, dividing by [unparseable or potentially dangerous latex formula] and taking the two closest integers to that. So you get [unparseable or potentially dangerous latex formula] from starting with the odd number [unparseable or potentially dangerous latex formula], then looking at [unparseable or potentially dangerous latex formula], taking [unparseable or potentially dangerous latex formula] to get the other two sides. Another example might be [unparseable or potentially dangerous latex formula]. Can you think of some triples that cannot be generated in this way? Are there any?

For this problem, we're given the hypotenuse, which if you use the above algorithm, is always the "[unparseable or potentially dangerous latex formula]" part... going in reverse we can find the smaller leg. [unparseable or potentially dangerous latex formula].

3) What are the first few sums? Look for a pattern, with an educated guess maybe. I must go.

Re: Some Q's

PostPosted: Tue Oct 27, 2009 7:02 pm
by sqrtneg1
3) It can be shown by induction that [unparseable or potentially dangerous latex formula]

In your specific example, [unparseable or potentially dangerous latex formula].

Re: Some Q's

PostPosted: Tue Oct 27, 2009 8:24 pm
by MistaPotta

Re: Some Q's

PostPosted: Tue Oct 27, 2009 9:21 pm
by sqrtneg1

Re: Some Q's

PostPosted: Tue Oct 27, 2009 9:24 pm
by AuSmith
And, the grand daddy of all pythagorean triple generators:

[unparseable or potentially dangerous latex formula]

Now try to find a triple that cannot be generated!

Re: Some Q's

PostPosted: Tue Oct 27, 2009 9:36 pm
by AuSmith

Re: Some Q's

PostPosted: Wed Oct 28, 2009 10:21 pm
by sqrtneg1

Re: Some Q's

PostPosted: Thu Oct 29, 2009 5:25 pm
by AuSmith