pre algebra

posted by mikey

Reiny can you please help with these 3 problem. 1. a1=-4;an-1-3 this is find the first five terms of the recursively defined sequence. Problem 2 and 3 is write the first terms of the explicitly defined sequence an=4n+2. problem 3 an=2(-3)n-1

1. Reiny

You seem to be persistent in writing your problem in a way that makes no sense.

Again, I will assume you mean:
a(1) = -4
a(n) = a(n-1) - 3

often this is written with subscripts
a1 = -4
an = an-1 - 3

so
a1 = -4
a2 = a1 - 3 = -4-3 = -7
a3 = a2 - 3 = -7-3 = =10

continue this pattern for 2 more terms

problems 2 and 3 make no sense to me
I thought these were recursively defined sequences. In that case the initial term must be defined, since each new term is found from its previous term.
With no brackets, who can tell what they mean.

2. mikey

problem 2 and problem 3 is to write the first terms of the explicitly defined sequences. problem 2: a(n)=4n+2. and problem 3: a(n)=2(-3)n-1.

3. mikey

i need to write the first five

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