Answer:
common ratio is 3
Step-by-step explanation:
an=a1r^n-1
243=81(r^2-1)
243=81r
r=243/81
r=3
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Answers & Comments
Answer:
common ratio is 3
Step-by-step explanation:
an=a1r^n-1
243=81(r^2-1)
243=81r
r=243/81
r=3