This week we learned a very simple chapter
the chapter focused on recognizing patterns and using formulas to find a specific part of the pattern
the types of patterns are
Arithmetic
Geometric
Neither
Arithmetic - is addition
Geometric - is multiplication
(division is considered Geometric because if a sequence divides it is considered to be a fraction.)
Then come the formulas to find a term:
Arithmetic:
tn-t'+(n-1)d
n=term #
t'=first term
d=what you add
tn=term#_in sequence
Geometric:
tn=t'∙r^(n-1)
r= what you multiply by
these formulas are used to find specific components of a pettern
its just a matter of memorizing what each variable of the formula represents and plugging in to solve.
What i dont understand comes along with the rest of what we learned
i think i am going to have a really hard time keeping track of which method to use on the test
if anyone has any tips for recognizing which lessons material to use that would be great
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My guess is that you would have to look at what it is asking from you. Like if it askes for the recursive definition then you would use that formula and if it asked for series, you would use that formula and so on. But if on the test, there is just a problem then im guessing you would use the original arithmetic or geometric formula from 13-1
ReplyDeleteAlso adding on to ^^^, if you can identify a sequence or series as arithmetic or geometric but do not know what to do, you can go back and use the origional Tn formula. The more we've worked on it this week, the more i've realized how much it helps. And just know your formulas!
ReplyDeleteJust make sure you know all your formulas, as long as you know all of the formulas you should know what to do, and like Alaina said, the original Tn formulas help a lot.
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