My Math Forum **Need Help for this Assignment**

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February 11th, 2019, 09:04 AM   #1
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**Need Help for this Assignment**

I have been given this question as an assignment to complete and have no clue on how to complete this question at all. Please try help as it's due in tomorrow so much help as possible will be greatly appreciated.

I have attached the assignment question with this post.

Good luck and best regards,
Lilshrekboye29
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 February 11th, 2019, 11:59 AM #2 Global Moderator   Joined: Dec 2006 Posts: 20,298 Thanks: 1971 By differentiating both sides of the given equation, $n(1 + x)^{n-1} = p_1 + 2p_2x + 3p_3x^2\,+\,......\,+\: np_nx^{n-1}$. For $n > 1$, substituting $x = -1$ gives $0 = p_1 - 2p_2 + 3p_3\,-\,......\,+\: np_n(-1)^{n-1}$. For $n = 1$, the above sum reduces to $p_1$, which is 1. For part (b), differentiate a second time, then substitute $x = 1$. If you want your work to be checked, post it here. Thanks from topsquark and idontknow Last edited by skipjack; February 11th, 2019 at 11:34 PM.
 February 11th, 2019, 02:01 PM #3 Senior Member   Joined: Dec 2015 From: iPhone Posts: 387 Thanks: 61 Try to set the coefficients equally.

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