dù bạn đăng nhầm nhưng mình vẫn trả lời nha !
a) f(x)- g(x)+h(x) = (x3-2x2+3x+1)-(x3+x-1)+(2x2-1)
f(x)- g(x)+h(x) = x3-2x2+3x+1- x3-x+1+2x2-1
f(x)- g(x)+h(x)= (x3-x3) +(2x2-2x2) +(3x-x)+(1+1-1)
f(x)- g(x)+h(x) = 0+0+2x+1
f(x)- g(x)+h(x) = 2x+1
b) Xét f(x)- g(x)+h(x)=0
Suy ra: 2x+1=0
2x= -1
x = - \(\dfrac{1}{2}\)
Cho đa thức: \(f\left(x\right)=x+x^2-6x^3+3x^4+2x^2+6x-2x^4+1\)
1. Thu gọn, rồi sắp xếp các số hạng của đa thức theo lũy thừa giảm dần của biến \(x\)
2. Xác định, bậc của đa thức, hệ số tự do, hệ số cao nhất
3. Tính \(f\left(-1\right),f\left(0\right),f\left(1\right),f\left(-a\right)\)
Bài 3: cho đa thức P(x)= 5x3 - x4 + 2x - x2 + x4 + 2x2 - 5x3 - 3
a, thu gọn tìm bậc của đa thức
b, Chứng tỏ X=-3 ; x=1 là các nghiệm của đa thức P(x)
c, Tìm nghiệm của đa thức Q(x) biết Q(x) + P(x) = x2 - x
Cần gấp
dùng tính chất cơ bản của phân thức , hãy điền 1 đa thức thích hợp
a) x^3 + x^2 / x^2 - 1 = ......./ x-1
b) 5x + 5y / ..... = 5x^2 - 5y^2 / 2y - 2x
I.Each sentence below contains an error.Underline it and write the correct answer in the provided
Example0: There \(\dfrac{are}{ }\) an art gallery in our neighbourhood
0/is
1. I find carve eggshells boring because it takes a lot of time to complete one shell
1/
2. My brother not goes to class to learn how to paint
2/
3. I take up this hobby when i came back home from the Art Gallery
3/
4. I think playing volleyball interest because it is a team game
4/
5. In my opinion,more people played monopoly in the future
5/
II.Fill each blank inthe following letter with a suitable word
Dear Mira,
Thanks for your letter.Now I'll tell you my hobbies.My favourite hobby is skitting.It's trange,isn't it? My mother me to knit two years ago.Now I can knit scraves and seaters.It's great when I can them to my relatives and friends as gifts.Knitting is also imaginative you can knit anything you can imagine of.Besides,it is quite cheap.You only a pair of needles and some wool.
I'm sending you a scarf next month.I'm knitting it.I hope you'll like it.
Best wishes,
Vy
Cho đa thức
P(x)= 2+5x2-3x3+4x2-2x-x3+6x5
a) Thu gọn đa thức
b) Tính P(1)
2. cho hình vẽ
biết ax//cy chứng minh rằng góc A+B+C=360 độ
Exercise1:
1)Many people began to wearing jeans because they were cheap.
=>Because of..............
2)Since he was careless,Tom lost the game.
=>Because of..............
3)Although she behaves well,no one loves her.
=>Despite................
4)Because of the cold weather,the crops are late this year.
=>Because of..............
5)Mary was worried because Tom was late.
=>Because of..............
6)Tom walked slowly because his leg was bad.
=>Because of..............
7)I came here because I want the English course.
=>Because of..............
8)I went to school although it was hot
=>Despite................
9)Because the dust in the room,I can't go in.
=>Because of..............
10)Because of too much smoke,we have to wear masks.
=>Because..................
Exercise2:Điền although,in spite of/despite.
1) the weather was bad,we enjoyed our trip.
2)The children slept well the noise.
3) earning a low salary,Linda gave money to her parents.
4)John rarely sees Paul they live in the same town.
5)Julie failed the exam of working very hard.
6) it was cold,she didn't put on her coat.
7)Tom went to work not feeling very well.
8)Anna never learned the language she lived there for two years.
1. cho hình vẽ
biết ax//cy góc A=40 độ , ab⊥bc. tính góc boy?
1.Nêu 10 từ có phiên âm /ə/ và /ɜː/
2.
3.
