làm giúp mk vs mk đg cần gấp
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4.
a, \(A=\sqrt[3]{15\sqrt{3}+26}=\sqrt[3]{\left(\sqrt{3}+2\right)^3}=\sqrt{3}+2\)
b, \(B=\sqrt[3]{5+2\sqrt{13}}+\sqrt[3]{5-2\sqrt{13}}\)
\(\Rightarrow2B=\sqrt[3]{40+16\sqrt{13}}+\sqrt[3]{40-16\sqrt{13}}\)
\(=\sqrt[3]{\left(\sqrt{13}+1\right)^3}+\sqrt[3]{\left(\sqrt{13}-1\right)^3}\)
\(=\sqrt{13}+1+\sqrt{13}-1=2\sqrt{13}\)
\(\Rightarrow B=\sqrt{13}\)
c, \(C=\sqrt[3]{182-\sqrt{33125}}+\sqrt[3]{182+\sqrt{33125}}\)
\(\Rightarrow C^3=364+3\sqrt[3]{182-\sqrt{33125}}.\sqrt[3]{182+\sqrt{33125}}\left(\sqrt[3]{182-\sqrt{33125}}+\sqrt[3]{182+\sqrt{33125}}\right)\)
\(=364-3C\)
\(\Rightarrow C^3+3C-364=0\)
\(\Leftrightarrow C=7\)
1, Ancester ship
2, It is a sacred place
3, Guests
4,Lullabies
5,cultivate
1,What do the Muong people often play?
2,Which is the largest ethnic group in VN
3, Whose the Cham children are named of?
4,What are the highlights of the Muong costume?
5,Where do the Muong live in with abundant......?
is raining
is taking - hopes - will pass
are visiting - visit
did not write - phoned
did not visit - caught
21 is raining
22 is taking/hopes/will pas
25 are visiting
26 visited
27 didn't write
28 phoned
29 didn't visit
30 caught
`(8x^3y^4z) : (4x^2y^4)`
`= (8:4) . (x^3 : x^2) . (y^4 : y^4) . z`
`= 2xz.`
y . 17 + y . 21 = 532
y.(17+21)=532
y.38=532
y=532:38=14