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What is the sum of the infinite geometric series?

−5+ 2 −4/5 + 8/ 25− 16/125...

Enter your answer in the box. Enter any fraction as a simplified fraction.

 Feb 4, 2021
 #1
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+1

Common ratio  =   2/-5  =  -2/5

 

Sum  =     first term  / ( 1 - common ratio ) =

 

-5 / ( 1 - - 2/5)    =  

 

-5/ ( 7/5)   =

 

(-5) 5/7 =   

 

-25/7

 

 

cool cool cool

 Feb 4, 2021

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