SOLUTION: Tn=3r^n-1,where r>0 Is the nth term of a geometric sequence. If the third term is 48 determine r

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Question 1127086: Tn=3r^n-1,where r>0 Is the nth term of a geometric sequence. If the third term is 48 determine r
Found 2 solutions by ikleyn, MathLover1:
Answer by ikleyn(52788)   (Show Source): You can put this solution on YOUR website!
.
 =  = 48  ====>


 =  = 16  ====>  r =  = +/- 4.


Since r should be positive, according to the condition, it implies that r = 4.



Answer.  r,  or the common ratio, is equal to  4.


Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!

,where Is the term of a geometric sequence.
compare to general formula:

If the third term , we know that , so we have








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