Page:Test affichage.djvu/20

${\begin{array}{rll}&+{\frac {1}{4^{6}}}.{\frac {851}{25.26.27}}&=+0.000011838\\&-{\frac {1}{4^{7}}}.{\frac {1132}{29.30.31}}&=\ldots \ldots \ldots \ldots \ldots -0{,}000002562\\&+{\frac {1}{4^{8}}}.{\frac {1453}{33.34.35}}&=+0{,}000000565\\&-{\frac {1}{4^{9}}}.{\frac {1814}{37.38.39}}&=\ldots \ldots \ldots \ldots \ldots -0{,}000000126\\&+{\frac {1}{4^{10}}}.{\frac {2215}{41.42.43}}&=+0.000000029\\&-{\frac {1}{4^{11}}}.{\frac {2656}{45.46.47}}&=\ldots \ldots \ldots \ldots \ldots -0{,}000000007\\&+{\frac {1}{4^{12}}}.{\frac {3137}{49.50.51}}&=+0{,}000000001\quad {\underline {\qquad \qquad \qquad }}\\&&{\underline {\qquad \qquad \qquad \qquad }}-0{,}056240075\\&&\quad +0{,}841638238\quad +0{,}841638238\\&&\qquad \qquad \qquad \qquad \quad {\underline {\qquad \qquad \qquad }}\\\end{array}}$

Ce qui donne $\ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ \ {\frac {\varpi }{4}}=0{,}785398163\,;$