Bernoulli, Daniel, Hydrodynamica, sive De viribus et motibus fluidorum commentarii

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119105SECTIO QUINTA. log. [1 - (1 - c{n3 - nmm/mmN} x)] = log. {1/2}c{n3 - nmm/mmN} x = {n3 - nmm/mmN} x - log. 2@
ſubſtitutiones ſi recte fiant, erit pro primo quem finximus affuſio-
nis
modo
(I) t = {γmN/n√(mm - nn) a} X (2 log.
2 + {mmn - n3/mmN} x)
quæ
poſito rurſus m = dat pro altero caſu
(II) t = {γN/n√a} X (2.
log. 2 + {n/N} x).
§. 16. Quum convertimus æquationes inventas, obtinemus
(I) x = {2mmN/mmn - n3} - [log.
(1 + c{-t/α}) - log. 2 + {t/}], &
(II) x = {2N/n} X [log.
(1 + c{-t/β}) - log. 2 + {t/}]
ubi
α, ut ſupra, = {-γmN/n√(mm - nn)a} &
β = {-γN/n√a}.
Si præterea, ut in proximo Corollario, ponatur t = , evaneſcit
unitas
præ quantitatibus, exponentialibus, quæ ſupra omnem ordinem infinitæ
ſunt
, &
fit log. (1 + c{-t/α}) = -{t/α} atque log. (1 + c{-t/β}) = -{t/β}:
unde tunc erit reſumtis valoribus litterarum α & β.
(I) x = {mt√a/γ√(mm - nn)} - {2mmN/mmn - n3} log.
2. &
(II) x = {t√a/γ} - {2N/n} log.
2.

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