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OpenStudy (anonymous):
Write the sum using summation notation, assuming the suggested pattern continues. -9 - 3 + 3 + 9 + ... + 81
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rebeccaxhawaii (rebeccaxhawaii):
okay so the numbers are increasing by 6 right ?
OpenStudy (anonymous):
yes
rebeccaxhawaii (rebeccaxhawaii):
so what is the formula ?
OpenStudy (anonymous):
Were using summation notation this time though
rebeccaxhawaii (rebeccaxhawaii):
yes but theres still a formula
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OpenStudy (anonymous):
I dont know how to make it on here
alones (alones):
wait i don't understand your question
OpenStudy (anonymous):
I understand the question now :) i figured out the answer
rebeccaxhawaii (rebeccaxhawaii):
oh good
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