Arithmetic Sequence

[trim matrix]

Please help. I'm not sure what to do though I know the formulas.

[pure plover]

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[old creek]

what do you have so far?

what formulas do you know?

[trim matrix]

not really that much

[trim matrix]

i do know the sum of the series formula thingy then how to find nth term thingy

[old creek]

please write them out

[trim matrix]

wait i gtg eat eh

[trim matrix]

S = n/2 [2a1 + ( n -1) d]
an= a1 + (n - 1) d

[old creek]

How can you relate a1 to the intial investment of 500$

[trim matrix]

the 500 will be the a1?

[old creek]

Brilliant

Now what can you say about the recurring investment of 100$ and d?

[trim matrix]

the d is 100

[old creek]

Marvelous

[trim matrix]

what to do next

[old creek]

Calculate the rest

[trim matrix]

idk what ill calculate like do i calculate the sum or the nth

[old creek]

Task 2 require you to calculate the first 10 terms

Task 3 requires the summation

[trim matrix]

okay thanks, can i not close this first? I might still have some questions or I might be unsure

[fossil cave]

@trim matrix has given 1 rep to @old creek

[old creek]

Sure

But I don't know how long I'll be on

[trim matrix]

It is fine for me, I'm the one who is asking help anyways plus the due date for this is at the end of the week 💪

[trim matrix]

This is what I did but I don't know what a1 do I use for 3) Letter B

[somber sundial]

it’s still the starting value of the investment, which is…?

[trim matrix]

500?

[somber sundial]

yup

[trim matrix]

Thanks you s

[trim matrix]

Dyk what formula do I use here?

[somber sundial]

does not specify simple or compound

why do you accumulate your starting value

[trim matrix]

wdym accumulate hehe 😓

im bad at english so hewdhjhasjkdhj

did u mean like change the starting value?? cause thats what i had done in my prelim exam

😭

[somber sundial]

i guess what it wants you to do is find the 4th term of the sequence

since its the end of the 3rd year

you start at year 0 i guess

wait you could start at year 1

this question sucks

like you know difference between compound and simple interest right

[trim matrix]

not rlly im getting confuse here

[somber sundial]

welp i have to go to school sadly so i cant help, hope another helper swings by soon, apologies