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Find the common ratio of the infinite geometric series: \( \frac{-3}{5}-\frac{5}{3}-\frac{125}{27}-\dots\)

 Aug 27, 2018
 #1
avatar+100569 
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Mathtoo...The common ratio  can be found by dividing a successive term by the preceding one

 

So   [-5/3 ]  / [ -3/5 ] =  -5/3 * -5/3   =  25  / 9

 

Check for yourself that  [-125 / 27]  / [ -5/3 ]  gives the same result...!!!

 

 

cool cool cool

 Aug 27, 2018

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