Question: Use n = 1 1 n 2 = n 2 6 to find the sum of the series n = 1 ( - 1 )

Use n=11n2=n26 to find the sum of the series n=1(-1)n1n2
Befect one:
a.-y'8
b.0
c.x'12
d.x3
Use n = 1 1 n 2 = n 2 6 to find the sum of the

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