Twitchy wrote:
Well, I have math first lesson tomorrow, and stupidly I put of the hmework till tonight and have just realised I totalyu don't get most of it. So help would be muchos appreciated and I need it like, right away. >_<
1. _Don't have to worry about, already done_
2. Find out the nth term of each of the following sequences.
a) 5, 7, 9, 11
b) 2, 5, 8, 11
c) 11, 16, 21, 26
d) 5, 13, 21, 29
3. _don't have to worry about, the photocopier didn't print it properly and I can't read it_
4. Find the nth term of each of the following sequences.
a) 3.5, 5, 6.5, 8, 9.5
b)5.1, 7.2, 9.3, 11.4
c) 3.6, 6.1, 8.6, 11.1
I know this sounds really stupid to most of you, but I'm really bad at math!
Like I said, all help will be greatly appreciated.
Even though I'm doing English coursework, I'm bored and would rather do my one true love (total lie), Maths!
Bascially, the nth term is used to describe patterns. n could be described as the position of the number. Taking the first as an example:
5, 7, 9, 11
Here, they are going up in increments of 2. 5 is in the first position, with 7 in the second.
The pattern for this is 2n+3, because, to get 5, you must multiply n, or the position, 1, by 2, and and 3. For 7, you must multiply 2, the position, by 2, because of the 2n, then +3 to get 7. If I asked you to tell me the 100th number, you would say, 203, because 100 x 2, then +3 = 203.
I useful way I was taught to indentify the leaps was:
Code:
5__7__9__11
2 2 2
(kindy fuzzy, but the point is to get the difference between leaps.
As they leap in twos, it will be 2n. As leaps become more complex, you use more rows, but I do not think that is relevent. It is +3, because 5 - 2 = 3, heh.
I hope that helps, it might be a bit sketchy, but I hope you get somewhere.
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