Principes de la géométrie analytique. Géométrie de l'espace, par L. Painvin.

314 -

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| I Os cJ3. q=:S p'pCiZrC.-?Lp7a~l ^co'rp'cLMb 1 " Ile d blanrl l e diarn& ZM iJalcm zdtZcbJ ozS &ct donozeeo rja-cz ClfJ/ ic) Igouscr dc
c"'. t <^ f~^"fS. 183,7 1 n-u Tr,^. l 413
B< * i~ coo dozzne~e dc-JL poizrenl iaL l-;
3. a,=- valcI A. de, LZ cor u tS' i-i ozL0- pa'cirMre- dc- ILtMaizzi-ort,
ccjIZ dle. LCo'z-tLCte-L-c- VotL~te — CT% JeC'It

" c=a,lz+p, a,=a+-Aa -p +AP,
[ -.,) 4 y 3+., | b,- \. a b,,r,-q+at.
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(CTrPT,) (^ ) (c-_ ar-_P) A a (- t+ b)- a 1 bb) +(y-bt -q ) |C~a62) A L-ab a) =o.