SOLUTION: An infinite geo series has the sum 16. If the sum of the first two terms is 15, find a1 and r

Algebra ->  Sequences-and-series -> SOLUTION: An infinite geo series has the sum 16. If the sum of the first two terms is 15, find a1 and r       Log On

So we have the system:



Use substitution:





 









using 





using 






Two solutions:

, 

and

, 
 
Edwin