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1) teach -> teaches
2) has -> have
3) taller -> tallest
4) talk -> talking
5) next to -> between
nếu đúng bạn tick ch mình nhé , c'mơn bạn
Cho mx hỏi câu nữa:
bài 1 : chia động từ trong ngoặc
1) She prefers (dance)............. to (sit)............. a place
2) While my mother (wash)............ clothes, I (cook)............. the meal
A. You can across the street here.
B.My sister can ride a bike but she can't drive a car.
( hoặc là : My sister can drive a car but she can't ride a bike.)
k mình nha
\(1+\frac{1}{2}\left(1+2\right)+\frac{1}{3}\left(1+2+3\right)+...+\frac{1}{\left(x\right)}\left(1+2+...+x\right)=2575\)
\(\Rightarrow1+\frac{\frac{3.2}{2}}{2}+\frac{\frac{4.3}{2}}{3}+...+\frac{\frac{\left(x+1\right)x}{2}}{x}=2575\)
\(\Rightarrow\frac{2}{2}+\frac{3}{2}+\frac{4}{2}+...+\frac{\left(x+1\right)}{2}=2575\)
\(\Rightarrow\frac{\left(x+3\right).\left(x\right)}{2}=5150\Rightarrow x\left(x+3\right)=10300=103.100\)
\(\Rightarrow x=100\)
Ta có: \(a\left(b+1\right)+b\left(a+1\right)=\left(a+1\right)\left(b+1\right)\)
\(\Leftrightarrow a+ab+b+ab=a+ab+b+1\)
\(\Leftrightarrow\left(a+ab+b+ab\right)-\left(a+ab+b\right)=1\)
\(\Leftrightarrow ab=1\left(ĐPCM\right)\)
Chúc bạn hok tot
1) She prfers dancing to sitting a place
2) While my mother was washing clothes , i was cooking meal
She prefects dances to sits a place
While my mother washing clothes, I cooking the meal