SOLUTION: Express the sum 1x2 + 2x3 + 3x4 + 4x5 + ... + 10x11 in summation notation.
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Question 74355: Express the sum 1x2 + 2x3 + 3x4 + 4x5 + ... + 10x11 in summation notation.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
If we let i=1 and sum each consecutive ith term we get
...
...
Which shows that our summation works
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