Sum of series

Determine the 6-th member and the sum of a geometric series:

5-4/1+16/5-64/25+256/125-1024/625+....

Final Answer:

a6 =  -1.64
SUM =  2.78

Step-by-step explanation:

 a1=15 q=54 q<1 a6=a1q61=15=15(54)5 a6=6251024=1.64
S=1qa1=925=2.78



Help us improve! If you spot a mistake, please let let us know. Thank you!







Tips for related online calculators
Need help calculating a sum, simplifying, or multiplying fractions? Try our fraction calculator.

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: