| 
5. too low, e„ too low; 
ve. 050, rr BO rl: 
d°z <0 dz 
du? > \ du’ a ee oe 
u >usfrom =D tou => + ae 
(fig. 2e) — 
6. zo too low, z,' too high; 
ie: o< Of >0> or BS 0; re 
ds 3 d'z 3 
— < Gon the left, — >0 on the right 
du’? du’? 
of the point of inflexion: 
de dz 
— = o, | — Ei 
du )w=-B US =d! 
a > dor u Ad ur ier a eee 
(fig. 2/) 
/ Te wy too high; -2,' too low; 
ie o> 0,2 Or of pS, 7 Oo 
dz 
du’? 
of the point of inflexion ; 
dz Tt 
Lim| — =0, Lim| — =e 
du Jk du! J =de 
Liz J 
> 0 on the left, = <0 on the right 
au 
ye 
/ 
: / 
(u',z) (we) ww for u< A, u >a for us 4 
Fro. eg. (fig. 29) 
8. «,' too high, «,' too high; 
a re Seat ae 0. E00, of 8 Or 
