Răspunsuri

2014-07-26T13:21:00+03:00
A)P1/P2=  4*l1/4*l2=   4*3/4*9= 12/36= 1/3

b)A1/A2= l² 1/ l² 2=  3²/9²= 9/81=  1/9
1 3 1