Question

Ghi đầy đủ giúp em ạ

Answer 1

1/1000

Answer 2

\(=\dfrac{1993}{7+1986}=\dfrac{1993}{1993}=1\)

Answer 3

c= \(\dfrac{1994x1993-1992x1993}{1992x1993+1994x7+1986}\)

c=\(\dfrac{1993x\left(1994-1992\right)}{1992x1993+1994x7+1986}\)

c= \(\dfrac{1993x2}{1992x1993+1994x7+1986}\)

c=\(\dfrac{2}{1992x1+1994x7+1986}\)

c=\(\dfrac{1}{13903161}\)

Answer 4

1/1000