a) 3/8 = 81/216

5/27 = 40/216

b) 17/420 = 68/1680

-9/80 = -189/1680

c) 11/120

7/40 = 21/120

d) -7/10 = -231/330

1/33 = 10/330

g) 3/(-7) = -9/21

2/3 = 14/21

-1/3 = -7/21

h) -4/7 = -36/63

8/9 = 72/63

-10/21 = -30/63

l) 10/42 = 220/924

-3/28 = -99/924

-55/132 = -385/924

m) 5/(2².3) = 5/12 = 110/264

7/(2³.11) = 7/88 = 21/264

tách ra bn ơi

tách ra

diện tích mảnh đất ABCD là

`(24+24+12)xx16:2=480(m^2)`

ds

\(\lim\limits_{x\rightarrow-\infty}\dfrac{\left|x\right|+\sqrt{x^2+x}}{x+10}\)

\(=\lim\limits_{x\rightarrow-\infty}\dfrac{-x+\sqrt{x^2+x}}{x+10}\)

\(=\lim\limits_{x\rightarrow-\infty}\dfrac{-1+\sqrt{1+\dfrac{1}{x}}}{1+\dfrac{10}{x}}=\dfrac{-1+\sqrt{1}}{1}=\dfrac{-1+1}{1}=0\)