Question: Can anyone please help this Calculus question? 1.sigma(n=1, infinity) (-1)^n (n^2+5n+1)/(2n^2+6n+10) 2.Sigma(n=1, infinity) (sin((2n-1)/2)pi/(n)) 3.Sigma(n=2, infinity) (cos(n*pi)/(1+(1/n)))

Can anyone please help this Calculus question?

1.sigma(n=1, infinity) (-1)^n (n^2+5n+1)/(2n^2+6n+10)

2.Sigma(n=1, infinity) (sin((2n-1)/2)pi/(n))

3.Sigma(n=2, infinity) (cos(n*pi)/(1+(1/n)))

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