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Những câu hỏi liên quan
PM
3
DT
Đỗ Thanh Hải
CTVVIP
2 tháng 7 2021
1 What an interesting film it is!
2 How fine the weather is!
3 My bathroom has a sink, a tub and a showers
4 Mrs Na grows vegetables and raises cattles on her farm
5 Which is the most suitable apartment for your family
2 tháng 7 2021
1.What an interesting film it is!
2.How fine the weather is!
3.My bathroom has a sink, a tub and a showers.
4.Mrs Na grows vegetables and raises cattles on her farm.
5.Which is the most suitable apartment for your family.
PM
1
NL
Nguyễn Lê Phước Thịnh
CTVHS
14 tháng 4 2022
a: \(=\left(\dfrac{7}{3}+\dfrac{7}{2}\right):\left(\dfrac{-175}{42}+\dfrac{132}{42}\right)+\dfrac{1}{2}\)
\(=\dfrac{35}{6}\cdot\dfrac{42}{-43}+\dfrac{1}{2}=\dfrac{-447}{86}\)
b: =38/7-17/7-3,25+4,55
=3+1,3=4,3
MM
1
NL
Nguyễn Lê Phước Thịnh
CTVHS
22 tháng 3 2023
a: \(A=2x^3-3x^2+4x+5\)
\(\dfrac{A}{B}=\dfrac{2x^3-3x^2+4x+5}{2x+1}\)
\(=\dfrac{2x^3+x^2-4x^2-2x+6x+3+2}{2x+1}=x^2-2x+3+\dfrac{2}{2x+1}\)
b: \(\dfrac{A\left(x\right)}{B\left(x\right)}=\dfrac{2x^3-3x^2+4x+a}{2x+1}\)
\(=\dfrac{2x^3+x^2-4x^2-2x+6x+3+a-3}{2x+1}\)
\(=x^2-2x+3+\dfrac{a-3}{2x+1}\)
Để A chia hết cho B thì a-3=0
=>a=3
A
1
\(a,\dfrac{1}{2}+\dfrac{1}{2}=\dfrac{2}{2}=1\\ b,\dfrac{3}{8}+\dfrac{1}{8}=\dfrac{4}{8}=\dfrac{1}{2}\\ c,\dfrac{7}{9}+\dfrac{5}{9}=\dfrac{12}{9}=\dfrac{4}{3}\\ d,\dfrac{1}{6}+\dfrac{2}{6}=\dfrac{3}{6}=\dfrac{1}{2}\\ e,\dfrac{3}{8}+\dfrac{7}{8}=\dfrac{10}{8}=\dfrac{5}{4}\\ g,\dfrac{2}{5}+\dfrac{3}{5}=\dfrac{5}{5}=1\)