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58<br />
(25) ;'2 = 2^(i ^ e)kx-\-[e'''— \)x'\<br />
For at diskutere (25), saetter vi for Kortheds Skyld<br />
(25a) 2^(i+^)>^=/, e'^—i^q,<br />
hvorefter Ligningen antager den simplere Form<br />
(25 b) y-^^pxJ^qx''^.<br />
Ifolge vor Definition maa q her forudsaettes storre end — l,<br />
hvorimod p kan antages positiv. Var nemlig / negativ, künde<br />
vi blot skifte positiv Retning for ;ir-Axen, og Tilfaeldet / = o,<br />
^>o giver de to rette Linier gennem O<br />
(25c) y^ ±\~q^x\<br />
p =• q ^=.0 giver ;r-Axen regnet dobbelt, medens Kurven for<br />
/ = o, q