@misc{NAM_1850_1_9__206_1, title = {Questions 219 et 220}, journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale}, pages = {206--208}, publisher = {Bachelier}, volume = {1e s{\'e}rie, 9}, year = {1850}, language = {fr}, url = {http://www.numdam.org/item/NAM_1850_1_9__206_1/} }