Use the following approximation formula to find an approximation of pi.π = (2√3), {1- (1/3), (1/3 ^ 1) + (1/5), (1/3 ^ 2)-(1/7), (1/3 ^) 3) ＋ (1/9) ・ (1/3 ^ 4) － ・ ・ ・}Lets observe how the approximate value of pi can be obtained as the number of terms increases.It can be observed that the convergence speed is very fast.
無限級数によるπの近似１３
