PLEASE TELL ME THE NAME OF THIS FORMULA!!!!! EXTREMELY URGENT!!
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PLEASE TELL ME THE NAME OF THIS FORMULA!!!!! EXTREMELY URGENT!!

[From: ] [author: ] [Date: 11-05-24] [Hit: ]
Study !-This is the formula for the sum of an arithmetic progression.......
Sn = [n x (2a + (n – 1) x d)] / 2 ?

I have atest fats approaching and the questions there use this formula, so i wanted to get some practise questionss that require its use but i dont know the name so i am STUCK-also, if you know where i can get some questions for it PLEASE TELL ME.
THANKYOU SO MUCH!!!!!

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Sn = [n x (2a + (n – 1) x d)] / 2 [lose the x, use (*) for multiplication]

measures the sum of an arithmetic series of n terms, where the first term is a and the difference is d...

The chapter/section of your book will be "sequences and series"

Study !

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This is the formula for the sum of an arithmetic progression.
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