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# need help with Important Math Formula for GMAT

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Intern
Joined: 19 Dec 2008
Posts: 8
Schools: Accounting
need help with Important Math Formula for GMAT [#permalink]

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20 Feb 2009, 19:44
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Hi all can we post helpful formulas for the test in this thread?

I have 2: L=a+(n-1)d
sum(of a sequence)= n/2[2a+(n-1)d]where L= last term, a=1st term and d=constant difference among the terms.

I need more sequence formula.
Manager
Joined: 15 Dec 2008
Posts: 52
Schools: HBS(08) - Ding. HBS, Stanford, Kellogg, Tuck, Stern, all dings. Yale - Withdrew App. Emory Executive -- Accepted, Matriculated, Withdrewed (yes, I spelled it wrong on purpose). ROSS -- GO BLUE 2011.
Re: need help with Important Math Formula for GMAT [#permalink]

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17 Mar 2009, 08:54
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RockHe wrote:
Hi all can we post helpful formulas for the test in this thread?

I have 2: L=a+(n-1)d
sum(of a sequence)= n/2[2a+(n-1)d]where L= last term, a=1st term and d=constant difference among the terms.

I need more sequence formula.

Arent there as many sequence formulas as there are unique sequences? That's the point of a sqeuence, it's defined by a particular formula.
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Joined: 09 Sep 2013
Posts: 15922
Re: need help with Important Math Formula for GMAT [#permalink]

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28 Oct 2014, 07:32
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Re: need help with Important Math Formula for GMAT   [#permalink] 28 Oct 2014, 07:32
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# need help with Important Math Formula for GMAT

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