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The first term of an arithmetic progression is -8. The ratio of the 7th term to the 9th term is 5:8. Calculate the common difference of the progression

 Jul 18, 2020
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The first term of an arithmetic progression is -8. The ratio of the 7th term to the 9th term is 5:8. Calculate the common difference of the progression  

 

–8      –5      –2      1      4      7      10      13      16  

 

1st     2nd    3rd                             7th               9th

 

The common difference is +3  

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 Jul 18, 2020

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