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SophieForan15
Please Help proofs

Does anyone have a vopy of the proof to derive the formula for sum of a finite. i cant find it in the book.


3 Comments
RMJ02
RMJ02
jst look it up on youtube there is loads of vidoes on it
Janetadio66
heres a link of proofs thatll be useful! good luck! http://www.dublinschoolofgrinds.ie/wp-content/uploads/2016/02/6th-Year-Maths-Bankers-Bible.pdf
SophieForan15
thank you so much Janetadio66.
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