Geometric Sequence (Summation)
I am told to solve the upper limit.
The lower limit is n=1
the general term is 1/2 times 3^n
the sum is 3587226
The questions says I don’t need logs to solve this. Trial and error with exponents will work.
I used this equation and tried trial and error
Tn =ar^n-1
I have tried 14.365 into the upper limit and that matches with the sum
but I think n represents the number of terms, therefore it can not be decimals.
Did I do something wrong ? Is there another way to solve this ?
Please help.
I am told to solve the upper limit.
The lower limit is n=1
the general term is 1/2 times 3^n
the sum is 3587226
The questions says I don’t need logs to solve this. Trial and error with exponents will work.
I used this equation and tried trial and error
Tn =ar^n-1
I have tried 14.365 into the upper limit and that matches with the sum
but I think n represents the number of terms, therefore it can not be decimals.
Did I do something wrong ? Is there another way to solve this ?
Please help.