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OpenStudy (anonymous):
Which of the following is the formula for the geometric sequence? 8, -16, 32, -64,...
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OpenStudy (lgbasallote):
formula for geometric sequence is \[a_n = a_1 r^{n-1}\] just substitute whatever is given to you
OpenStudy (lgbasallote):
btw a_1 means first term r is the common ratio...usually solved via \(a_2 \div a_1\) n is the number of terms a_n is the last term
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