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homura1650 , 4 months ago There are still a lot of rather arbitrary decisions to make. Is 4/pi inside or outside of the summation? Is it (-1)^n+1 or (-1)^n with an additional negative sign in any of the other natural locations for it. Is the e term outside of the fraction with a negative exponent, or part of the denominator. Do you start with n=0 or n=1 (and adjust the terms inside the summation accordingly) Did they expand (2n+1)^2?
There are still a lot of rather arbitrary decisions to make.
Is 4/pi inside or outside of the summation?
Is it (-1)^n+1 or (-1)^n with an additional negative sign in any of the other natural locations for it.
Is the e term outside of the fraction with a negative exponent, or part of the denominator.
Do you start with n=0 or n=1 (and adjust the terms inside the summation accordingly)
Did they expand (2n+1)^2?