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Arithmetic sequence is 1/7,2/7,3/7...Wha...

Arithmetic sequence is 1/7,2/7,3/7...What is the sum of the first 7 terms of this sequence?

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Sum of first 7 terms `1//7+2//7+…...+7//7=(1+2+…...+7)/7=28/7=4`
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