Help lol (I have no idea on how to do this)
The sequence a(letter n under the a) = 1000(1.03)^n describes the amount of money in an interest-earning account where n is the number of years passed after the account is open opened.
A. $11940.5
B. $1125.51
C. $1159.27
D. $1229.87

- anonymous

- jamiebookeater

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- nikato

do you have more to the question?

- anonymous

sadly no that's all there is to that

- anonymous

Do I find n?

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## More answers

- nikato

oh. is this not a multiple choice question?
does this question just have 4 parts?

- anonymous

well it is a multi choice, but this question is very confusing lol

- nikato

i dont think you can find any amount unless you are given n, or the year the account is open

- anonymous

omg xD soo confusing ok can we do another one?

- nikato

yea. i think we dont have enough info to solve. what's your other problem?

- anonymous

ok thanks and here ya go:
What is the domain of the sequence?
2, 10, 50, 250, 1250
A: 2, 10, 250, 1250 <--- (I think this one but I'm just just used to range and domain on coordinates)
B: 2, 3, 4, 5, 6
C: 2, 10, 50, 1250
D: 1, 2, 3, 4, 5

- anonymous

oops c is 2, 8, 40, 200, 1000

- nikato

no.
domain of sequence are counting numbers: 1,2,3,4,5,...
all the other choices are range of sequence, or the terms

- anonymous

so D?

- anonymous

ok, how about another one?

- nikato

yup. and sure

- anonymous

Write the first five terms of the sentence.
\[a _{n} = (-2)^{2}\]

- nikato

is your question correct?

- anonymous

https://k12va.aplusanywhere.com/R85Statics/media/pictures/algebra%20ia/4.3.3/test/05/1419028113353/1366x768/1419028113353.png

- anonymous

oops I put 2 not n sorry

- nikato

ok. much better.
to find first term. plug in 1 into n.
to find 2nd, plug in 2 to n
to find 3rd, plug in 3 into n.
and keep going until 5

- anonymous

oh wow easier than I Thought lol thanks! :D one more?

- nikato

sure

- anonymous

Which recursive rule describes the sequence?
3, 1, 5, -3, 13, ...
A:
\[a _{1} = 3, a _{n} = -2a_{n-1} +7\]
B:
\[a _{1} = 3, a _{n} = 7a_{n-1} +2\]
C:
\[a _{1} = -2, a _{n} = 3a_{n-1} +7\]
D:
\[a _{1} = -2, a _{n} = 7a_{n-1} +3\]

- nikato

well you can eliminate C and D because the first term is 3
so
a1=3

- nikato

then i recommend plugging into the equation and see which one fits
lets try the first one
|dw:1433740675835:dw|
and look, its the second term in your sequence so this is probably your asnwer

- anonymous

oooh I always thought it was more than just plugging in things and thank you!

- nikato

no problem.
sometimes with multiple choice, its faster by just plugging in

- anonymous

soo true, can't believe it's this easy! lol

- nikato

yup. most of your questions was just plugging in stuff.
good luck on it!

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