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Trừ câu thứ 2 từ dưới nên còn câu còn lại dễ mà em mới lớp 6 luôn đó
Last night, I didn't order milkshake because I wasn't thirsty
How much time do you spend on math homework each day?
Eating fruits and vegetables is the healthiest way to stay fit
Question 1: I’m interested in taking part in a clean-up event this month. (fancy)
I fancy taking part in a clean-up event this month
Question 2: The bookshelves are as high as the windows. (same)
The bookshelves are the same height as the windows
Question 3: Let’s collect old plastic bottles and paper in our school. (why)
Why don't we collect old plastic bottles and paper in our school?
Question 4: My friends go to the studio to practice dancing. I do it too. (and)
My friends go to the studio to practice dancing and so do I
1 We planted trees together in the community garden a month ago
2 Her voice is as beautiful as a melody from a fairy tale
3 We have a school assembly in the school yard on Monday mornings.
Để \(\dfrac{\sqrt{n}-1}{2}\inℤ\) thì \(\sqrt{n}-1⋮2\) \(\Rightarrow\) \(n\) là số chính phương lẻ.
Mà \(n< 82\) nên \(n\in\left\{1,9,25,49,81\right\}\)
Vậy \(n\in\left\{1,9,25,49,81\right\}\) thỏa mãn ycbt.
(9².2¹⁴)/(8².6⁷)
= [(3²)².2¹⁴]/[(2³)².2⁷.3⁷]
= (3⁴.2¹⁴)/(2⁶.2⁷.3⁷)
= 2¹⁴/(2¹³.3³)
= 2/3³
= 2/27
