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	Two sequences		2016-08-20
		Ting pose la question : The first four terms of a sequence are 4, 20, 56 and 120. By comparing with the nth term of sequence 1,5,14 and 30 which is 1/6n(n+1)(2n+1), find a formula for nth term. Can you precisely show out how you do this questions ( with the steps please) Penny Nom lui répond.
	The nth term of a sequence		2012-10-19
		Emily pose la question : I don't understand how to do this question: Nth term for 9, 7, 5, 3, 1 Is there a fast way to do nth term for this question? Or in fact any question? Penny Nom lui répond.
	nth term		2008-10-22
		jen pose la question : what is a nth term and how do i find the nth term of any sequence Penny Nom lui répond.
	Finite differences		2003-02-10
		Jenny pose la question : I need to find a formula that will work with any number. I am finding the volume of a 3d cross- shape. Here are my results so far: Term Number 0 1 2 3 4 5 nth term 1 7 25 63 129 231 1rst diff 6 18 38 66 102 2nd diff 12 20 28 36 3rd diff 8 8 8 I can't seem to find a formula that will work with any number. Any help would be much appreciated. Penny Nom lui répond.

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