1. \(f\left(x\right)=x+x^2-6x^3+3x^4+2x^2+6x-2x^4+1\)

\(\Rightarrow f\left(x\right)=7x+3x^2-6x^3+x^4+1\)

Sắp xếp theo lũy thừa giảm dần của biến x:

\(f\left(x\right)=x^4-6x^3+3x^2+7x+1\)

2. Bậc của đa thức: 4

Hệ số tự do: 1

Hệ số cao nhất: 7

3. \(f\left(-1\right)=\left(-1\right)^4-6.\left(-1\right)^3+3.\left(-1\right)^2+7.\left(-1\right)+1=4\)

\(f\left(0\right)=0^4-6.0^3+3.0^2+7.0+1=1\)

\(f\left(1\right)=1^4-6.1^3+3.1^2+7.1+1=6\)

\(f\left(-a\right)=\left(-a\right)^4-6.\left(-a\right)^3+3.\left(-a\right)^2+7.\left(-a\right)+1=3a+1\)

\(\)

Do you know who the best footballer in the world?

who is the best footballer do you know in the world ?

Hoa's parents hope visit to her in Hanoi soon.             Bye lady

7.The doctor took her temperature and gave her some tablets.

Everyday, Hoa gets up early and takes morning excercises.

Hình như đề sai... k chắc lắm

Everyday , Hoa gets up early and takes morning exercies

Sắp xếp:

5, everything / very / was / at / her / strange / first / and / for / difficult.

=> At first, everything was very strange and difficult for her.

At first,everything was very strange and dificult for her

Hoa' hope to visit her parents in Ha Noi soon.

Hoa's parents hope to visit her in soon.

tick mk nha!

7, next / they / show / around / them / week / Hanoi / Hoa / visit / will / when / her. 

=> Hoa will visit Hanoi next week when they show her around them.

Câu trả lời:

Hoa lives away from home, so she has to take care of herself.

The dentist looked at her teeth and told her not to worry.

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