Hello, here are a few formulas that will be given to us during an upcoming exam, and i dont know what each one does.

Tn = a + (n -1)d

Sn = n/2[2a + (n-1) d]

Sn = n/2(a +tn)

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- Jan 27th 2008, 09:26 PMsimplekinnot sure about a few formulas?
Hello, here are a few formulas that will be given to us during an upcoming exam, and i dont know what each one does.

Tn = a + (n -1)d

Sn = n/2[2a + (n-1) d]

Sn = n/2(a +tn) - Jan 27th 2008, 09:44 PMmr fantastic
- Jan 27th 2008, 09:48 PMsimplekin
- Jan 27th 2008, 09:56 PMmr fantastic