SOLUTION: write the following using sigma notation and find the sum 11,4,-3,-10,....,-143

Question 1201458: write the following using sigma notation and find the sum 11,4,-3,-10,....,-143
Answer by Edwin McCravy(20056) (Show Source): You can put this solution on YOUR website!









we need to find what n equals when 18-7n = -143
                                     -7n = -161
                                       n = 23

  <-- summation notation for sum





We use the formula for 

  <--sum

Edwin

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