Đa thức A có chia hết cho đa thức B

   x⁴ - x² + 4x - 1

= x⁴ - ( x² - 4x + 1 ) 

= (x²)² - ( x - 1 )²

= ( x² - x +1 ).( x² +x -1 )

Chúc bạn học tốt nha ! 

3.2x + 4.3x - 2.7 = 3.9

6x + 12x - 14 = 27

x ( 6 + 12 ) = 27 -14 = 13

18x = 13

=> x = 13 : 18 = \(\frac{13}{18}\)

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In the picture, I look like to fall down.

My hobby is watching TV. I love watchin TV in my free time very much. Watching Television is my indoor hobby however it never interfere with my study at school or at home. I always prefer to finish my school home work and learn well then I can have time to watch TV. I always think watching TV is a good hobby because it can provide me good knowledge in many other areas. I generally discovery channels and see news including animal planet. I also watch interesting cartoons which can bring me creative and new ideas to make cartoons and arts for my art subject in school. My parents also love my hobby and they are very happy when they listen a lot of the latest news via me in my own voice.

1, \(\frac{1}{2}-\left(6\frac{5}{9}+x-\frac{117}{8}\right):\left(12\frac{1}{9}\right)=0\)

   \(\left(\frac{6.9+5}{9}+x-\frac{117}{8}\right):\frac{12.9+1}{9}=\frac{1}{2}\)

 ( . là nhân nha) 

    \(\left(\frac{59}{9}-\frac{117}{8}+x\right):\frac{109}{9}=\frac{1}{2}\)

    \(\frac{59}{9}-\frac{117}{8}+x=\frac{1}{2}\cdot\frac{109}{9}\)

    \(\frac{59}{9}-\frac{117}{8}+x=\frac{109}{18}\)

   \(x=\frac{109}{18}-\frac{59}{9}+\frac{117}{8}\)

\(x=\frac{113}{8}\)

\(\frac{1}{2^2}+\)\(\frac{1}{3^2}+\)\(\frac{1}{4^2}+\)...+\(\frac{1}{2015^2}+\)\(\frac{1}{2015}\)

<\(\frac{1}{1.2}+\)\(\frac{1}{3.4}+\)\(\frac{1}{4.5}+\)...+\(\frac{1}{2014.2015}\)+\(\frac{1}{2015}\)

Ta có:\(\frac{1}{1.2}+\)\(\frac{1}{3.4}+\)\(\frac{1}{4.5}+\)...+\(\frac{1}{2014.2015}\)+\(\frac{1}{2015}\)

\(1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}+\frac{1}{4}-\frac{1}{5}+...+\frac{1}{2014}-\frac{1}{2015}+\frac{1}{2015}\)

=1

\(S=\frac{1}{11}+\frac{1}{12}+\frac{1}{13}+\frac{1}{14}+\frac{1}{15}+\frac{1}{16}+\frac{1}{17}+\frac{1}{18}+\frac{1}{19}+\frac{1}{20}>\frac{1}{20}+...+\frac{1}{20}\)(10 số \(\frac{1}{20}\))

=\(\frac{1}{20}.10=\frac{1}{2}\)

vậy S>1/2

Lưu ý là chữ S có 1 nét cong

Câu 1: Bộ Hoàng triều luật lệ được vua Gia Long ban hành vào năm 1815.

Câu 2: Vào những năm 1831-1832 nhà Nguyễn chia nước ta ra 30 tỉnh và 1 phủ (phủ Thừa Thiên).

Chúc bạn học tốt !