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1 tháng 11 2021
\(a,=\dfrac{\sqrt{3}\left(\sqrt{5}-\sqrt{2}\right)}{\sqrt{7}\left(\sqrt{5}-\sqrt{2}\right)}=\dfrac{\sqrt{21}}{7}\\ b,=\dfrac{\sqrt{5}\left(\sqrt{3}+\sqrt{2}\right)}{\sqrt{4}\left(\sqrt{3}+\sqrt{2}\right)}=\dfrac{\sqrt{5}}{2}\\ c,=\dfrac{\sqrt{x}\left(\sqrt{x}+\sqrt{y}\right)}{\sqrt{y}\left(\sqrt{x}+\sqrt{y}\right)}=\dfrac{\sqrt{xy}}{y}\\ d,=\dfrac{\left(\sqrt{3}-\sqrt{2}\right)\left(2\sqrt{5}-\sqrt{3}\right)}{\left(2\sqrt{5}-\sqrt{3}\right)\left(1-\sqrt{2}\right)}=\dfrac{\sqrt{3}-\sqrt{2}}{1-\sqrt{2}}\\ =\left(\sqrt{2}-\sqrt{3}\right)\left(\sqrt{2}+1\right)=2+\sqrt{2}-\sqrt{6}+\sqrt{3}\)
NN
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7 tháng 10 2021
d2: =sum(a2:c2)
d3: =sum(a3:c3)
d4: =sum(a4:c4)
d5: =sum(a5:c5)
d6: =sum(a6:c6)
Your house is smaller than my house
The red car is more expensive than the black one
The bathroom has a sink, a tub and a shower
Trung is the tallest person in the group
Is this the best refrigerator you got?
N houses in this street is older than mine
Madonna sings the most beautifully
Their address is at 83 Son Tay street
Your house is smaller than my house.
The red car is more expensive than the black one.
The bathroom has a sink, a tub and a shower.
Trung is the tallest in the group.
Is this the best refrigerator you have?
No houses on the street is older than my house.
There is a living room, a bed room and a kitchen in my house.
Madonna sings the most beautifully.
How about going to the beach for a chance?
Their house is at 83 Son Tay Street.