"Animate" (as in §15.5) the series 1-1/3+1/5-1/7+1/9- 1/11- . .

"Animate" (as in §15.5) the series 1-1/3+1/5-1/7+1/9- 1/11- . . . . It is known as Leibniz's series and converges to pi/4.



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