Question

1^2 + 4^2 + 7^2 + ... + (3n - 2)^2 = [n(6n^2 - 3n - 1)]/2

Answer 1

induction?

Answer 2

Yeah. :/

Answer 3

sec

Answer 4

Okay! :)

Answer 5

would take way to long to type it. ask if you have questions.

note how easy it is if you use summation notation.

Answer 6

Thank you so much. I've been working on this problem all day! I think that I actually understand induction based on how you wrote it out! Thank you so much again!

Answer 7

u LARS ?

Answer 8

Who the hell are u?

Answer 9

You are such a loser ** get a life *

Answer 10

Bye!

Answer 11

@_Unknown_17 Excuse me... Who are you?

Answer 12

np @Mrbonez321
just think of dominoes. this method will work on all the summation ones, and will help you get a better understanding of induction, i agree.

Answer 13

@zzr0ck3r Thank you for your help. I just have a quick question. On the foil, you got 6n^3 + 15n^2 + 11n + 2... But i dont understand where you got the 15n^2 from...

Answer 14

Ohhh i don't wanna talk! bye !

Answer 15

dont worry about the douchebags, there are plenty on the site.

Answer 16

on the rhs or the lhs?

Answer 17

LHS

Answer 18

are you talking about after this step 9n^2+6n+1+(n(6n^2-3n-1)/2)

Answer 19

Yes.

Answer 20

(9n^2+6n+1)+(n(6n^2-3n-1)/2)
we need a common denom of 2, so we multiply 9n^2+6n+1 (top/bottom) by 2

(18n^2+12n+2)/2 now we have (18n^2+12n+2)/2 +(n(6n^2-3n-1)/2) =
[(18n^2+12n+2)+(n(6n^2-3n-1)]/2 = [18n^2+12n+2+6n^3-3n^2-n]/2 =
[6n^3 + 18n^2-3n^2+12n-11n+2]/2 = [6n^3+15n+11n+2]/2

Answer 21

Oh!!!! I forgot to multiply by two on the 9n^2 +6n+1 part!!! Thank you so much!!!

Answer 22

np

Answer 23

a+(b/c) = (ac+b)/c