Asked by Austin
Find the rule for each geometric sequence
a3 = -4, a6 = 500
a3 = -4, a6 = 500
Answers
Answered by
oobleck
well, a6 = a3 * r^3, so r^3 = -500/4 = -125
so, r = -5
now you can find a, and of course, as for all GP's
a<sub><sub>n</sub></sub> = ar<sup><sup>n-1</sup></sup>
so, r = -5
now you can find a, and of course, as for all GP's
a<sub><sub>n</sub></sub> = ar<sup><sup>n-1</sup></sup>
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