section 13-2
this section is just about recorsive numbers in a sequence
tn-1 means previous term
tn-2 means two terms back
tn-3 means three terms back
recorsive means define in terms of what came before
find the 2nd and 3rd terms
they give you a starting number and a sequence
t1=7 tn=tn-1+1
brob said you look at tn-1 as the term before and not as anything minus 1
so you take your first number and you plug it in
you will get tn=4(7)+1
then you get 29
so then you plug that number in to get the next one
so you get tn=4(29)+1 which equals 117
you do that to find infinite numbers in a recorsive sequence
example number 2
they could ask you what was asked above or they could give you the numbers and ask you to write a recorsive definition. which means a formula!
so if they gave you 4,7,10,13
you can see that they are adding three
soo tn=tn-1=3
and you use that formula to find other numbers
No comments:
Post a Comment