Math Is Fun Forum

EMPhillips1989

Member

Registered: 2008-01-21

Posts: 40

index laws

  where n>=0

prove by induction on n that

  where n,m >=0

please help

Dragonshade

Member

Registered: 2008-01-16

Posts: 147

Re: index laws

Dont know if this is correct but I'll try

Last edited by Dragonshade (2008-04-25 03:51:34)

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: index laws

http://www.mathisfunforum.com/viewtopic.php?id=9903

ROBBYM

Member

Registered: 2008-04-24

Posts: 10

Re: index laws

http://www.mathisfunforum.com/viewtopic.php?id=9903

I don't think there is any need for rudeness, this person requires help there's no need for put downs

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: index laws

Sorry.

But having two threads having identical first posts and different sets of replies is just confusing.

Last edited by JaneFairfax (2008-04-25 09:05:57)

ROBBYM

Member

Registered: 2008-04-24

Posts: 10

Re: index laws

so you can prove the base step is true for n=1 by

]

for the induction step if you let N=m+n

dividing by x we get

i think that may be right any other suggestions???

Identity

Member

Registered: 2007-04-18

Posts: 934

Re: index laws

Generally double-posting is frowned upon because then helpers need to waste time reiterating what was said in the first post.

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: index laws

There should be a rule to ban people like EMPhillips1989 for wasting helpers’ precious time on the forum.

luca-deltodesco

Member

Registered: 2006-05-05

Posts: 1,470

Re: index laws

while i can agree he shouldnt have done this, i hardly call my time precious

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The Beginning Of All Things To End.
The End Of All Things To Come.

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: index laws

while i can agree he shouldnt have done this

I’m glad you agree.

Ricky

Moderator

Registered: 2005-12-04

Posts: 3,791

Re: index laws

There should be a rule to ban people like EMPhillips1989 for wasting helpers’ precious time on the forum.

Ban people for making a mistake?  That's ridiculous.  And look Jane, now you're wasting my time making me respond to you...

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"In the real world, this would be a problem.  But in mathematics, we can just define a place where this problem doesn't exist.  So we'll go ahead and do that now..."

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: index laws

I do NOT think it is a mistake. I think EMPhillips1989 DELIBERATELY double posted! Check his two posts. They are identical, character for character! It could only have been a copy & paste job – EMPhillips1989 deliberately copied his old post and pasted it to start an unnecessary new thread!

Mistakes are understandable and easily forgiven. BUT DELIBERATE DOUBLE POSTING SHOULD BE A BANNABLE OFFENCE!

Last edited by JaneFairfax (2008-04-26 10:52:16)

Ricky

Moderator

Registered: 2005-12-04

Posts: 3,791

Re: index laws

BUT DELIBERATE DOUBLE POSTING SHOULD BE A BANNABLE OFFENCE!

I'm not going to sit here and try to convince you why that is overkill.  Especially when you are being particularly rude and typing in all caps.  It's not a ban-able offence, especially when someone has been a member here for a while.

---

"In the real world, this would be a problem.  But in mathematics, we can just define a place where this problem doesn't exist.  So we'll go ahead and do that now..."

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: index laws

It looks like the other thread has been deleted for redundancy – so I’ll not go on about this any further. I hope EMPhillips1989 has been warned not to do it again in future.

Last edited by JaneFairfax (2008-04-27 03:51:32)