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    (Original post by Zacken)
    Yep, if the second derivative is less than 0 (i.e negative) then it's a maximum. Have you spotted why you got \frac{-2(x+1)}{(x+4)^2}? It should be \frac{2(x+1)}{(x+4)^2} - you probably forgot a minus whilst differentiating or something.
    Yeah I did, thank you! I forgot to carry it onto the next line oops! And I didn't think differential sounded right, thanks for correcting me!
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    (Original post by Blake Jones)
    Yeah I did, thank you! I forgot to carry it onto the next line oops! And I didn't think differential sounded right, thanks for correcting me!
    Awesome, good job!
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    (Original post by Lollieboo)
    Alright calm down cowboy. If you go to the 'report a post section', there is no option to report someone for giving a full solution or similar. So personally I only guidance of how to answer questions. No rules or strictly forbidding anything.
    (Original post by RDKGames)
    Yes there is. Not constructive.
    Please do not post full solution unless as a last resort.
 
 
 
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