Bài 6:

\(34,075;34,175;34,257;37,303\)

34,075 < 34,175 < 34,257 < 37,303

34,075;34,175;34,257;37,303

`21 km //h = 21 000 m // 60 phút `

`= 350m // phút `

1 She failed to do everything she was supposed to do

2 There is no likelihood that anyone will apply for this post

3 He succeeded in finishing the English test in time

4 There is no likelihood that the situation will improve in the near future

5 There is a chance that you will get what you want there

6 Don't check your answers before answering all the questions

7 I won't give an opinion before thinking this through

8 The judge will decide after hearing all the evidence

9  I won't be able to have a holiday until I save enough money

10 There is little likelihood that my sister will win the first prize in the singing contest

11 He made no reference of his new job when I last spoke to him

1 She failed to do everything she was supposed to do

2 There is no likelihood that anyone will apply for this post

3 He succeeded in finishing the English test in time

4 There is no likelihood that the situation will improve in the near future

5 There is a chance that you will get what you want there

6 Don't check your answers before answering all the questions

7 I won't give an opinion before thinking this through

8 The judge will decide after hearing all the evidence

9  I won't be able to have a holiday until I save enough money

10 There is little likelihood that my sister will win the first prize in the singing contest

11 He made no reference of his new job when I last spoke to him

\(2x^3+5x^2-3x=0\Leftrightarrow x\left(2x^2+5x-3\right)=0\Leftrightarrow x\left(2x-1\right)\left(x+3\right)=0\Leftrightarrow\left[{}\begin{matrix}x=0\\x=\dfrac{1}{2}\\x=-3\end{matrix}\right.\)

b: \(\Leftrightarrow8\left(1-3x\right)-2\left(3x+2\right)=140-15\left(2x+1\right)\)

=>8-24x-6x-4=140-30x-15

=>-30x+30x=115-4=111

=>0x=111(vô lý)

a)

f(x) + h(x) = g(x) 

\( \Rightarrow x^4 - 3x^2 + x-1 \) + h(x) = \(x^4 - x^3 + x^2 +5\)

\(\Rightarrow \) h(x) = \(( x^4 - x^3 + x^2 + 5 ) - ( x^4 - 3x^2 + x-1 )\)

\(\Rightarrow \) h(x) = \(x^4 - x^3 + x^2 + 5 - x^4 + 3x^2 - x +1\)

\(\Rightarrow\) h(x) = \(( x^4-x^4 ) + ( -x^3 ) + ( x^2 + 3x^2 ) + ( 5+1)\)

\(\Rightarrow\) h(x) = \(4x^2 - x^3 +6\)

Vậy h(x) = \(4x^2 - x^3 +6\)

b) f(x) - h(x) = g(x)

\(\Rightarrow \) \(x^4 - 3x^2 +x-1\) - h(x) = \(x^4 - x^3 + x^2-1\)

\(\Rightarrow\) h(x) = \((x^4 - 3x^2 +x-1)\) - \((x^4 - x^3 + x^2 +5 )\)

\(\Rightarrow\) h(x) = \(x^4 - 3x^2 + x-1 - x^4 + x^3 - x^2 - 5\)

\(\Rightarrow\) h(x) = \(( x^4-x^4 ) + x^3 + ( -3x^2 - x^2 ) + ( -1-5 )\)

\(\Rightarrow\) h(x) = \(x^3 - 4x^2 -6\)

Vậy h(x) = \(x^3 - 4x^2 -6\)