1.Rewrite each of the following sentences using the word given:

1.All the roads were flooded because it had been raining heavily (due to)

2.Jimmy ate a lot of fastfood,so he put on 10 kilograms within just 2 months(because)

3.My father got upset because I repeatedly left on the lights I was not using (so)

4.The contaminated drinking water caused the outbreak of cholera  in the village (due to)

5.Human activity is to blame for many forms of pollution on earth (result in ).

Biểu thức M trong đẳng thức  là 5x/x^2+2x+1.M=x/x^2-1 là

Tìm x biết 1/x . x/x+1 . x+1/x+2 .  x+2/x+3 .  x+3/x+4 = 1

Biểu thức  M trong đẳng thức x+2y/x^3 : M=5x^2+10xy/x^2+2xy+4y^2

Đa thức P trong đẳng thức x+1/x-2 = P/x^2-4

Kết quả rút gọn phân thức  1-x^2/x(1-x)