Chosen Answer: Not enough information to really know what you’re talking about. I’m going to take a shot regardless and see if I can help. The equation that this probably refers to is y=r^(2n-3). Thus, the fifth term is 128 and the seventh term is 2048, so y_7-y_5=1920. The first eleven terms of this series [...]
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the seventh term exceeds the fifth term by 1920.find the sum of the first eleven term.r=2?
Posted by Eleven2 on April 20th, 2012
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