In 9198, write a formula for the general term (the nth term) of each geometric sequence
Chapter 5, Problem 97(choose chapter or problem)
In Exercises 91–98, write a formula for the general term (the nth term) of each geometric sequence. Then use the formula for \(a_n\) to find \(a_7\) , the seventh term of the sequence.
0.0004, -0.004, 0.04, -0.4,. . .
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