`-x^3/8+3/4x^2-3/2x+1`
`=-(x^3/8-3/4x^2+3/2x-1)`
`=-(1/8x^3-3/4x^2+3/2x-1)`
`=-[(1/2x)^3-3/4x^2+3/2x-1^3]`
`=-(1/2x-1)^3`
Đáp án: `-(1/2x-1)^3`
$\begin{array}{l} S = \dfrac{{ - {x^3}}}{8} + \dfrac{3}{4}{x^2} - \dfrac{3}{2}x + 1\\ \Rightarrow 8S = - {x^3} + 6{x^2} - 12x + 8\\ \Rightarrow 8S = {\left( {2 - x} \right)^3} \Rightarrow S = \dfrac{{{{\left( {2 - x} \right)}^3}}}{8} \end{array}$
Giúp mình với mình cần gấp 1. Although he earn a small salary, he is happy -> In spite 2. She doesn't have enough money so she can't buy the dictionary. -> If he 3. We visited our old school when we went to Ho Chi Minh city. -> 4.Hoa can't go to school because she is sick. -> Hoa
So sánh hơn: a. A rose/ beautiful/ a weed. _______________________________________________ b. A dog/ intelligent/ a chicken. _______________________________________________ c. Ba/ friendly/ Nam. _______________________________________________ d.Your house/ far/ from school / my house. _______________________________________________ e. A horse/ strong/ a person. __________________________________________
cho a,b thuộc Z, so sánh (b>0) a/b với a+2021/b+2021
So sánh ngang bằng. a. Mary/ tall/ her brother. _______________________________________________ b. A lemon/ not sweet/ an orange. _______________________________________________ c. A donkey/ not big/ a horse. _______________________________________________ d. This dress/ pretty/ that one. _______________________________________________ e. the weather/ not cold/ yesterday. _______________________________________________
Về tâm giác ABC có góc A=75 độ,AB=3,5cm,AC=5cm Vẽ hình giúp em ạ
Vẽ Ahri bằng tay(không copy mạng)
Cho ∆ABC có AC > AB, trung tuyến AM. Trên tia đối của tia MA lấy điểm D sao cho MD = MA . Nối C với D a) Chứng minh ∆ AMB = ∆DMC. b) Chứng minh góc ADC > góc DAC và góc MAB > góc MAC c) Kẻ đường cao AH. Gọi E là một điểm nằm giữa A và H. So sánh HC và HB; EC và EB.
2. She can’t stay (long) …………………….than 30 minutes. 3. It’s (good) ……………………. holiday I’ve had. 4. Well, the place looks (clean) …………………….now. 5. The red shirt is better but it’s (expensive) ……………………. than the white one. 6. I’ll try to finish the job (quick).……………………. 7. Being a firefighter is (dangerous) ……………………. than being a builder. 8. Lan sings ( sweet ) ………………..than Hoa 9. This is (exciting) ……………………. film I’ve ever seen. 10. He runs ( fast )………………….of all. 11. My Tam is one of (popular) ……………………. singers in my country. 12. Which planet is (close) ……………………. to the Sun? 13. Carol sings as (beautiful) …………………….as Mary, but Cindy sings the (beautiful)
5. She / nice / is / very. _________________________________________________. 6. My / birthday / mother’s / in / is / September. _________________________________________________. 7. goes / to / Monday / he / school / on. _________________________________________________. 8. at / eat / we / breakfast /6.30 am. _________________________________________________. 9. What / go / you / to / bed / time / do? _________________________________________________. 10. Why/ you/ do/ want/ English/ to/ learn/ well? _________________________________________________.
Tại sao " đi từ khởi nghĩa từng phần tiến công và nổi dậy" lại không phải trong cách mạng tháng 8 năm 1945 ?
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