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31-10-2021
Mathematics

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PLSSSSS HELP ME, Write a formula for the sum of the first three terms, a1+a2+a3, Your answer should only include variables a1 and d.
btw,
term 1=a1
common difference=d

Respuesta :

taniya4940 taniya4940

31-10-2021

S3= 3/2 [2a1+(3-1)d]

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