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consider the following geometric sequence -5,10, -20,40 if the explicit formula for the sequence above is expresses in a form an=b x c^n-1 , determine the values of b and c
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consider the following geometric sequence -5,10, -20,40 if the explicit formula for the sequence above is expresses in a form an=b x c^n-1 , determine the values of b and c

User Joel Trauger
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b=-5 and c=-2. b is the first term in the sequence and-2 Is the common ratio of the sequence.
User Reos
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