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2. Which answer represents the series in sigma notation?

 

Thank you! Just need help understanding this practice problem

 Apr 4, 2019
 #1
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The common difference is 5

The first term is -7   =  a1

 

Notice that, the jth term is given by :

 

aj  =  a1  + 5(j - 1) 

 

aj  =  -7  + 5j -  5

 

aj  =  -12  +  5j

 

aj =  5j - 12

 

Do you see the correct answer, based on this ????

 

 

cool cool cool

 Apr 4, 2019

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