Asked by Sara
Given geometric sequence tn find t6 and S∞ if t2 = 243 and t5=9
Answers
Answered by
R_scott
the fact that S∞ exists means that | r | < 1
... two terms that are three apart (t2 and t5) are both positive, so r is positive
243 r^3 = 9 ... r = ?
find r and t1 and plug them into the sum equation
... two terms that are three apart (t2 and t5) are both positive, so r is positive
243 r^3 = 9 ... r = ?
find r and t1 and plug them into the sum equation
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