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OpenStudy (anonymous):
find A4, the fourth term of geometric sequence whose first term is A1 =6720 and common ratio is r=-1/4
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OpenStudy (anonymous):
A4= ?
OpenStudy (tkhunny):
a1 = 6720 a2 = 6720*(-1/4) a3 = 6720*(-1/4)^2 etc.
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