- anonymous

hey can anyone help me with series/sequences? (algebra 2)

- jamiebookeater

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- sandra

hey what type of sequences/series?

- anonymous

um not sure can i give u a problem and u try to help?

- anonymous

????

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## More answers

- sandra

sure

- anonymous

Write the series using summation notation.
7 + 10 + 13 + 16 + 19

- sandra

ah ok. so the first number is 7, so that is a constant

- anonymous

k...

- anonymous

do i have to pay to get help on here??

- sandra

\[\sum_{n=0}^{n=4} 7+3*n\]
so something liek that?

- anonymous

yes but how did u get that....

- sandra

well, you are trying to make the summation equation part of it (the 7 + 3*n in this case), generate all of the numbers in the series if you input different values for "n".
So given 7+10+13+16+19, you can start at the left.
So if when n=0, the thing on the right is 7, then we know that 7 is a part of the summaition series

- anonymous

oh

- sandra

so then the question is , what can I add to 7, so when n=1 I'm adding 10, when n=2 I'm adding 13, and n=3 I'm added 16

- sandra

so in fact my answer was wrong =)

- anonymous

o...

- sandra

or wait, sorry, I was right lol

- sandra

ok so if n=0, and the right side is 7

- sandra

and n=1, and the right side is 10

- sandra

I've added 3

- sandra

so my guess is that the right side is 7+3(n)

- sandra

let's see if it holds true for n=2

- sandra

for n=2, according to me, the third number is the series would be:
7 + (3*2) = 7+6 = 13

- sandra

and so on..

- anonymous

kk thanks!!!!!!!

- anonymous

do i have to pay for this..

- anonymous

no its free

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