( 9 ' ) 
Ax -[- Ba: ” * &c. =r o, that immediately fol- 
low one anoAer, multiply the Terms of this Equation 
firft by the Progreflion », n — i, n — &c. then by 
t le rogreflion « i, « — — 3, §cc. then by 
f 2, 3,;^ -- 4, till you have multiplied 
by as many Progreflions as there are Units in ;; r i : 
Ihen multiply the Terms of the Equation that arifes, 
as often by the Progreflion o, 1, i, 3 &c. as tliere are 
units in r — i, and you will at length arrive at a 
Qjjadrat jck of this Form, 
[ x"« — -r— z 6cc. >^ 7 ZZ~i 
xr ~zx r — 3xr — 4 &c. 
n — rx ^2 
1 xn 
^ r~—zxn — r — 3 6cc. 
^ xr^zxr -r- 3 ^c,xEx 
^ I xn — r — xxn — r — 3X n — r— -X&c. 
xr+ixrxr^ I xr — x SCc.x F = o, 
and dividing by theFadorT;/ — r — i,j/ r z Srr 
and r — r, r — z 6cc. which are found in each Coef.’ 
oenr, th is Equation will be reduced to r 
X22 ^ r_xzx I xDat’ ^ r x z xr x ^Ex M 
2 X I X r + I X r F = o, whofe Roots mud be ima- 
ginary (by Prop i.) when — ^ „ x— !_ x E* is 
Id's than D F. From which it is imnifed tl^t Tyou di- 
vide each Term of this Series of Fradions JL ^ 
2 n 
3 ' 4 ' ■ ^ diat which 
proceeds it, and place-the Qjiotients above the Terms 
of the Equation ^ Cx”~^^ 
<5cc. = 
