x+y=a

y+z=b

z+x=c tính x,y,y theo a,b,c

cho biểu thức M= x/x+y=y+y/x+y+t+x/y+z+t=t/x+z+t với x;y;z ;t là các số tự nhiên khâc 0. chứng minh M^10 bé hơn 1025

Fill in each blank with a suitable word to complete the passage.

During the year ...(1) in England try their best to study at ... (2) and help their mother with the ....(3). They have no lesson .... (4) Christmas Day. They stay at home to help their parents decorate the .... (5) and the Christmas tree. Before bedtime on Christmas Eve , they ... (6) their stocking at the feet of their beds. ... (7) Christmas will bring them presents during the night. On Christmas Day they go to .... (8) in the morning then they have a special ...(9) with turkey and Christmas cakes. After that they ... (10) some game in the afternoon.