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OpenStudy (mary.raee):
what is the 9th term of the geometric sequence 4, -20, 100...? A) -312,500 B) -12,500 C) 62,500 D) 1,562,500
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OpenStudy (mathmale):
Find the common multiple. 4 times what equals -20?
OpenStudy (mary.raee):
5
OpenStudy (yowarning):
who reported me
OpenStudy (mathmale):
Actually, the common factor is -5. 4 times -5 is -20. -20 times -5 is +100. What is the formula for a geometric sequence?
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