Leonhard Euler · 1748 · Internet Archive
Introductio in analysin infinitorum
All 320 leaves · leaf 213
Transcription
RECURRENTIBUS. 185
CAP. XIII.
222. Seriei ergo quae oritur ex hac fractione
$\frac{A+Bpz}{(1 - 2pz \cos \Phi + p^2 z^2)^3}$
terminus generalis erit hic
$\frac{A p^n z^n}{16 (\sin \Phi)^5} ( \frac{(n+5)(n+4)}{1 \cdot 2} \sin(n+1)\Phi - \frac{2(n+1)(n+5)}{1 \cdot 2} \times$
$\sin(n+3)\Phi + \frac{(n+1)(n+2)}{1 \cdot 2} \sin(n+5)\Phi )$
$+ \frac{B p^n z^n}{16 (\sin \Phi)^5} ( \frac{(n+4)(n+3)}{1 \cdot 2} \sin n\Phi - \frac{2n(n+4)}{1 \cdot 2} \sin(n+2)\Phi +$
$\frac{n(n+1)}{1 \cdot 2} \sin(n+4)\Phi )$.
Atque, ulterius progrediendo, Seriei, quae oritur ex hac fractione
$\frac{A+Bpz}{(1 - 2pz \cos \Phi + p^2 z^2)^4}$
terminus generalis erit hic
$+
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