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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

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