Question

Write these series with summation notation.
1) 1+4+7+ . . . +19

2) 1, 4, 9, 16, . . .

Answer 1

\[\sum_{i=1}^{19} i+3 \]

Answer 2

2) is not a series.

Answer 3

its a seq of perfect squares tho

Answer 4

For 2)?

Answer 5

Yes, we all can see \(8^2\) in amistre64

Answer 6

woohoo!! i thought i was the only one :)

Answer 7

lol, you are taken after all.

Answer 8

lol

Answer 9

mugwump101 answer is incorrect.

Answer 10

I think you can write number 2 as a series though, can't you?

Answer 11

Really? why?

Answer 12

you cant sum a series that isnt a series

Answer 13

there aint 19 terms

Answer 14

1 to ..... not 19

Answer 15

16+3 = 19; 19+3 not= 19

Answer 16

and 2+3 = 5 not 4

Answer 17

its just all messed up lol

Answer 18

Here is the answer \( \large \sum \limits_{n=1}^{7} 3n-2 \)

Answer 19

\[\sum_{i=1}^{}-2+3(i)\]yeah that thinkg

Answer 20

That makes alot more sense, thanks fellas. :)

Answer 21

amstre you are slow :P

Answer 22

its this accursed IE im playing n; and my old brain i have to work with too lol

Answer 23

LOL I see. Thanks for your input XD