Find a formula for the nth partial sum of the series

Prove that the infinite EX = 1 (-1) K diverges. (Tip: Calculate the first terms of the partial sum sequence and determine a formula for the partial amount NTH, SN. Using this, It is a formal proof, beginning with the definition of divergence of this series. (Additional reference: Workshop Week # 7) A partial sum is a sum of part of a sequence. ................
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