6o ^e tta^tnfngeg 
= V* * 2VZ >i' Z% X* =: 2VZ + Z% fltml*eICÖ 2VZ 
— X* — og V = — z, fßlgdigMiwdv == — dz— xMz, 
2Z 2 2 2Z* 
t)cb at fubftituere itlfe SSccitieiv fane^ 
dv Fx* * V* = — vdz — x^'vdz — zdz — X'zdz 
2 2i&^ 2 2Z^ 
— — x^dz * zdz — x'^dz »i* x?zdz — zdz — x^zdz 
~4Z~ ~4~ 4z* 4z== 2 2z* 
= — xMz -i« zdz — x*dz ^ x^dz — zdz ■— x^dz 
~4z ~4~ 4z' 4z 2 2z 
= - zdz - x^ - x^dz (^^^.^ j^^^g^^,^ 
4 4z' 2z 
= _ z' i< X* — x* log:z, mCtt Da Z Cfn: * — V 
z' = X* * av^' — 2y ?^x* »fv^, m an toet> J^iefy of ttfl^ 
fcorfffaffep z af integraler, fm€ fdxdv ^x^* = — x^dx 
jr - 8 
— v-dx vdx r x^'i'y' 'i» x^dx 
4 4 8x' * i6v* — i6v Fx^ ^ V* 
— x'dxlog; (y^>if V'— v) *Conft: fomep=: x'dx iog: x, naflr mrttt. 
2 2 
fl'cmkfe^ t ©tctict foy v foefferticn fjccic y, fitpponatr öen ^ede 
gotnnut paa npe at integrere^, teD at foctte x fem «kftanttg foi: at 
faae et Integrale, fom %uita fov tet ()eclc ^Imt, tlitjer M = 
f(yx'dx >i' fy'dx) 
x'dx — y'dx 'i> y Vx' dx x*dx 
V -g- 4 8x^*i6y' — i6y Fx' ^ y. 
— x'dxlog; (Fx^ »i» _ y) x'dxIog:x\ 
2 3 ✓ 
