"The theory of Probabilities drafted by some celebrated Geometers has seemed to me susceptible of being examined thoroughly, and being made part of elementary instruction: I have thought that a treatise would not at all be unworthy of being offered to the public, which would be able to enrich with new truths this interesting matter, and put it in the range of the greatest number of readers." |
Haec methodus in quadraticis aequationibus verum praebet numerum impossiblium radicum: in cubicis autem eius probabilitas inveniendi impossibiles radices non videtur maiorem habere rationem ad probabilitatem fallendi quam 2:1. In aequationibus autem multo superiorum dimensionum haec methodus verum impossibilium radicum numerum perraro deteget. | This method in quadratic equations provides the true number of impossible roots: but in cubics the probability of it discovering the impossible roots is not seen to have a ratio to the probability of being mistaken greater than 2:1. But in equations of much higher dimension this method will detect the true number of impossible roots very rarely. |
Haec methodus semper impossibiles radices deteget, quando praecedens regula in Ex. 1 data eas inveniet; & saepe impossibiles radices inveniet, quando praedicta fallit. e.g. In cubicis aequationibus impossibiles, si modo ullae sint, radices semper deteget; in aequationibus n dimensionum, quarum (n vel n-1) radices sint impossibliles, probabilitas verum impossibilium radicum numerum e praecedente regula detegendi videtur esse ad probabilitatem verum impossibilium radicum numerum ex hac regula detegendi prope in ratione 2n-2: 3n-2 | This method will always detect impossible roots, when one will find them by the preceding rule given in Ex. 1; & often will find impossible roots, when the previous rule fails. E.g., in a cubic equations, it will always detect impossible roots, if there are any; in equations of n dimensions, of which (n or n-1) roots are impossible, the probability that the preceding rule will detect the true number of impossible roots, is seen to be to the probability of detecting the true number of impossible roots in this rule nearly in ratio 2n-2:3n-2. |