u 



{ x* = fPxdx; & i = ? Px J* X Si -He mkne 



j *- ** 



Que <p &: \J/ reprefentem deux fbn£Uon& quelconques r£- 

 gulieres ou irpegulieres , telles que 



MN =r= -jpAM = <px 



MQ = «\,AM = 4>x 7 on aura; I 

 jVfxV'= <p^M'= $ (x -+- /v'O 



JW'Q' = ^ AM' *=%£.(* ■+■ We ) 

 W\> = -4/^^= >J, ( x - <tVx > ,& 



*. jP ar con%uent ( 



,M«_Vc( ^ ■ ) 



-wy = ~ f^ (x -+■ t Vc) i x 



*Af* = — /^.(x-fV'f)^) done 



p (pCx-t-fv'c) -+- <p(x — tVc} 



z 

 /\|/ (x -+■ r vV) dx — /">J, (x - t Vc) dx 



^ \£ ( x -+- r V c ) -i- -J, / * — r »/ c ) 



f d.y (x -*- tV c) ^ _ J .<s< x —tV c) 



<+Vc -• 



2 



Soit 





