Решите (1/2+1/3)2; (1/2)2+(1/3)2;(1/2)+2×1/2×1/3+(1/3)2.
(1/2+1/3)*2=1+2/3=1 2/3 (1/2)*2+(1/3)*2=1+2/3=1 2/3 (1/2)+2 * 1/2 *1/3 + (1/3)*2=1/2+1/3+2/3 =1 2/3