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Title: Algebra question Post by: mystical_goat on Friday, January 18, 2019, 17:09:21 You build a pyramid of cubes with 1 cube on the top layer, 4 together on the 2nd, 9 on the 3rd, etc. There are 1 cubes in a 1 layer pyramid, 5 in a 2 layer, 14 in a 3 layer etc. How many cubes in an n layer pyramid?
Title: Re: Algebra question Post by: Ardiles on Friday, January 18, 2019, 17:13:21 I'll have a go at this later. Love this stuff. I know someone else will get there first though. :)
Title: Re: Algebra question Post by: Gwah on Friday, January 18, 2019, 17:19:47 I made it (2n^3 + 3n^2 + n)/6
I may be wrong. (Sorry Ardiles) Title: Re: Algebra question Post by: Reg Smeeton on Friday, January 18, 2019, 17:23:05 Is it to do with Pascal's triangle and pyramid?
Title: Re: Algebra question Post by: Combe Up on Friday, January 18, 2019, 17:30:41 Is the triangle anything to do with Oxford United's ground?
Title: Re: Algebra question Post by: 4D on Friday, January 18, 2019, 18:09:10 Thames Valley triangle?
Title: Re: Algebra question Post by: Reg Smeeton on Friday, January 18, 2019, 18:27:40 Thames Valley triangle? Is that like the Winnersh Triangle which is something that's always puzzled me. Title: Re: Algebra question Post by: Lemis on Friday, January 18, 2019, 18:35:32 I made it (2n^3 + 3n^2 + n)/6 I may be wrong. (Sorry Ardiles) You're correct Title: Re: Algebra question Post by: Samdy Gray on Friday, January 18, 2019, 19:02:16 Well Googled.
Title: Re: Algebra question Post by: mystical_goat on Friday, January 18, 2019, 19:32:12 I made it (2n^3 + 3n^2 + n)/6 I may be wrong. (Sorry Ardiles) Amazing! That's way beyond my capabilities. Thank you. Title: Re: Algebra question Post by: suttonred on Friday, January 18, 2019, 19:55:04 What the holy hell are you lot talking about? Tits, music, football, films, and tits should be the topics.. I think the word bra prompted at least 2 of those.
Title: Re: Algebra question Post by: Ardiles on Friday, January 18, 2019, 20:01:40 Promise I haven't looked at the posts above before posting. :D
I get: (2n3+3n2+n)/6 Title: Re: Algebra question Post by: Ardiles on Friday, January 18, 2019, 20:02:49 I made it (2n^3 + 3n^2 + n)/6 I may be wrong. (Sorry Ardiles) Good work!! Title: Re: Algebra question Post by: suttonred on Friday, January 18, 2019, 21:19:37 Is that like the Winnersh Triangle which is something that's always puzzled me. Should be called winnersh dead zone. I got off a national express for a wee there on the way back from a game in London when I lived in Reading. The coach driver decided he could do with one less drunken passenger and left me there. Took me ages to get home. Nothing there of human interest. Title: Re: Algebra question Post by: Reg Smeeton on Friday, January 18, 2019, 21:30:32 Should be called winnersh dead zone. I got off a national express for a wee there on the way back from a game in London when I lived in Reading. The coach driver decided he could do with one less drunken passenger and left me there. Took me ages to get home. Nothing there of human interest. So a bit like the Bermuida Triangle for human interest.... Title: Re: Algebra question Post by: BambooToTheFuture on Saturday, January 19, 2019, 01:40:27 Layer No : 1, 2, 3, 4, 5, 6...etc
Layer Am: 1, 4, 9, 16, 25, 36...etc Differenc: 0, 3, 5, 7, 9, 11..etc Accum Sum:1, 5, 14, 30, 55, 91...etc So n should look something like; n = (2n³+ 1)(3n¨+ n) __________________ 6 * ¨ = squared Could've totally fucked this up on second thoughts. Oh well! It's like a Fibonacci/Pascal mash up! I can't remember the name for it, been a while. Title: Re: Algebra question Post by: BambooToTheFuture on Saturday, January 19, 2019, 01:43:28 Yep, definitely fucked it up, just looked back and I've added an extra "+1" in and fucked up my brackets, apparently. Doh!
Well done Gwah :doh: :crash: Title: Re: Algebra question Post by: Tails on Saturday, January 19, 2019, 08:58:08 My other half is a Maths teacher so I sent this to her. She told me to fuck off. Can't complain really
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