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OpenStudy (anonymous):
The second term in a geometric sequence is 50. The fourth term in the same sequence is 112.5. What is the common ratio in this sequence?
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OpenStudy (anonymous):
a2 = 50 a4= 112.5 and it is geometric sequence. It means a3 = a2*ratio a4 = a3*ratio now, replace a3 into a4, you have a4 = a2*ratio*ratio = a2*ratio^2 = 112.5 right? can you step up??
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