hi! is this correct???

http://img149.imageshack.us/img149/4651/formulary5.jpg

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- April 27th 2008, 09:29 AMyuriythebestformula question
hi! is this correct???

http://img149.imageshack.us/img149/4651/formulary5.jpg - April 27th 2008, 09:35 AMflyingsquirrel
Hi

No, it's wrong, unless * is the symbol you use for the sum and + the one you use for the product... :D - April 27th 2008, 09:36 AMMoo
Hello,

Not it isn't.

(I suppose it's n, not a) is equal to

The only thing you can do is to factor by , if :

- April 27th 2008, 09:36 AMMathstud28
- April 27th 2008, 09:48 AMyuriythebest
wow thanks for the lighting-quick responses. But it seems I am still doing something terribly wrong:

http://img516.imageshack.us/img516/4...tion001ah6.jpg - April 27th 2008, 09:50 AMMoo
I'd make a substitution :

Then the equation is now uČ+u=6 :) - April 27th 2008, 10:54 AMyuriythebest
ok I tried it that way but it seems I am going around in circles...

http://img135.imageshack.us/img135/1...tion002gt4.jpg - April 27th 2008, 11:03 AMflyingsquirrel
No, you're not "going around in circles". Once you have found the two solutions of , you can solve for : and so on...

Be careful about - April 27th 2008, 11:26 AMyuriythebest
ok I tried that and got 2 negative roots:

http://img340.imageshack.us/img340/3...tion003vq8.jpg - April 27th 2008, 11:32 AMflyingsquirrel
OK you got the idea, now, read again the post #8. (especially the last sentence "Be careful...") :D

- April 27th 2008, 12:20 PMyuriythebest
thank you flyingsquirrel! answer iz correct!

- April 27th 2008, 11:56 PMearboth
- April 28th 2008, 05:04 AMyuriythebest
yeah I understood that. cause of my spelling I mistook one of my u's for a 4 and therefore the incorrect answer. With your help I redid it and everything is correct.