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OpenStudy (anonymous):
What is the common ratio of the following sequence? 9, -27, 81, -243
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OpenStudy (anonymous):
well work backwards. What is -27 ÷ 9 ?
OpenStudy (anonymous):
everything is multiplying by -3
OpenStudy (anonymous):
thats how i would find a ratio
OpenStudy (anonymous):
oh ratio! My bad. I was thinking like...the other thingie...
OpenStudy (anonymous):
It will be \[(-3)^{n+1}, \]
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OpenStudy (anonymous):
lol okay becca and thanks dta255
OpenStudy (anonymous):
No problem, anytime
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