Page:Annales de mathématiques pures et appliquées, 1830-1831, Tome 21.djvu/156

${\begin{alignedat}{3}x=&0^{m}{,}00,&\quad u=&10^{\circ }{,}00,&\quad {\frac {\operatorname {d} u}{\operatorname {d} x}}=&-0{,}53,\\\\x=&0{,}25,&u=&9{,}13,&{\frac {\operatorname {d} u}{\operatorname {d} x}}=&-0{,}24,\\\\x=&0{,}50,&u=&8{,}71,&{\frac {\operatorname {d} u}{\operatorname {d} x}}=&-0{,}12,\\\\x=&0{,}75,&u=&8{,}56,&{\frac {\operatorname {d} u}{\operatorname {d} x}}=&-0{,}03,\\\\x=&1{,}00,&u=&8{,}53,&{\frac {\operatorname {d} u}{\operatorname {d} x}}=&\mp 0{,}00,\\\\x=&1{,}25,&u=&8{,}56,&{\frac {\operatorname {d} u}{\operatorname {d} x}}=&+0{,}03,\\\\x=&1{,}50,&u=&8{,}71,&{\frac {\operatorname {d} u}{\operatorname {d} x}}=&+0{,}12,\\\\x=&1{,}75,&u=&9{,}13,&{\frac {\operatorname {d} u}{\operatorname {d} x}}=&+0{,}24,\\\\x=&2{,}00,&u=&10{,}00,&{\frac {\operatorname {d} u}{\operatorname {d} x}}=&+0{,}53.\end{alignedat}}$

La formule générale est

$u={\frac {10.u_{x}}{1{,}172}}.$

dans laquelle