Leonhard Euler · 1748 · Internet Archive
Introductio in analysin infinitorum
All 320 leaves · leaf 45
Transcription
FUNCTIONUM.
17
CAP. II.
nulla occurrit potestas, vocantur Factores simplices, ut distinguantur a Factoribus compositis, in quibus ipsius $z$ inest quadratum vel cubus, vel alia potestas altior. Erit ergo in genere $f+gz$ forma Factorum simplicium, $f+gz+hz^2$ forma Factorum duplicium; $f+gz+hz^2+iz^3$ forma Factorum triplicium, & ita porro. Perspicuum autem est Factorem duplicem duos complecti valores simplices, Factorem triplicem tres simplices, & ita porro. Hinc Functio ipsius $z$ integra, in qua exponens summæ potestatis ipsius $z$ est $n$, continebit $n$ Factores simplices; ex quo simul, si qui Factores fuerint vel duplices vel triplices, &c. numerus Factorum cognoscetur.
29. Factores simplices Functionis cujuscunque integræ $Z$ ipsius $z$ reperiuntur, si Functio $Z$ nihilo æqualis ponatur, atque ex hac æquatione omnes ipsius $z$ radices investigentur: singula enim ipsius $z$ radices dabunt totidem Factores simplices Functionis $Z$.
Quod si enim ex æquatione $Z=0$, fuerit quæpiam radix $
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