what your favourite food?
A.beef B.orange juice C.leaf D.milk
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LM
1
4 tháng 10 2022
Đầu kiện: \(a>0;a\ne1\)
\(P=\left(\dfrac{4a}{\sqrt{a}-1}-\dfrac{\sqrt{a}}{\sqrt{a}\left(\sqrt{a}-1\right)}\right).\dfrac{\sqrt{a}-1}{a^2}\\ =\dfrac{4a-1}{\sqrt{a}-1}.\dfrac{\sqrt{a}-1}{a^2}\\ =\dfrac{4a-1}{a^2}\)
b.
\(P=3\Leftrightarrow\dfrac{4a-1}{a^2}=3\\ \Leftrightarrow3a^2-4a+1=0\)
\(\Rightarrow\left[{}\begin{matrix}a=1\\a=\dfrac{1}{3}\end{matrix}\right.\)
So với đầu kiện bài toán ta có a = 1/3 thõa mãn bài toán.
LH
2 tháng 10 2022
Mr. Lee works more impolitely than Mr. Robin.
#hoctot
2 tháng 10 2022
1 Dan is at home with his family
2 there is a big yard in front of Mike's house
3 is your apartment opposite a bakery?
4 there are many clubs for you to join
5 Thieu and Tuong are two characters in Yellow Flowers on the Green Grass
2 tháng 10 2022
1 is not as easy as this one
2 doesn't sing as beautifully as her
3 is the most intelligent person in my group
4 doesn't drive as carefully as him
2 tháng 10 2022
1, This task is easier than that one
-> That task is more difficult than this one.
2, Hoa sings more beautiful than her sister
-> Hoa's sister sings as not beautiful as her.
3, No one in my group is more intelligent than Minh
-> Minh is the most intelligent person in my group.
4, He drives more carefully than his brother
-> His brother drives more carelessly than him.
Its D
A