Các câu hỏi tương tự
left(frac{1}{2+2sqrt{x}}+frac{1}{2-2sqrt{x}}-frac{x^2+1}{1-x^2}right)left(1+frac{1}{x}right)left(frac{2-2sqrt{x}+2+2sqrt{x}}{left(2+2sqrt{x}right)left(2-2sqrt{x}right)}-frac{x^2+1}{1-x^2}right)left(1+frac{1}{x}right)left(frac{4}{4-4x}-frac{x^2+1}{left(1-xright)left(1+xright)}right)left(1+frac{1}{x}right)left(frac{1+x-x^2-1}{left(1-xright)left(1+xright)}right)left(1+frac{1}{x}right)frac{xleft(1-xright)}{left(1-xright)left(1+xright)}.frac{x+1}{x}1
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\(\left(\frac{1}{2+2\sqrt{x}}+\frac{1}{2-2\sqrt{x}}-\frac{x^2+1}{1-x^2}\right)\left(1+\frac{1}{x}\right)\)
\(=\left(\frac{2-2\sqrt{x}+2+2\sqrt{x}}{\left(2+2\sqrt{x}\right)\left(2-2\sqrt{x}\right)}-\frac{x^2+1}{1-x^2}\right)\left(1+\frac{1}{x}\right)\)
\(=\left(\frac{4}{4-4x}-\frac{x^2+1}{\left(1-x\right)\left(1+x\right)}\right)\left(1+\frac{1}{x}\right)\)
\(=\left(\frac{1+x-x^2-1}{\left(1-x\right)\left(1+x\right)}\right)\left(1+\frac{1}{x}\right)=\frac{x\left(1-x\right)}{\left(1-x\right)\left(1+x\right)}.\frac{x+1}{x}=1\)
TENSES EXAMPLES SIGNAL WORDS Present Simple Tense 1. We go to school. 2. 3. Present Continuous Tense 1. 2. 3. Present Perfect Tense 1. 2. 3. Past Simple Tense 1. 2. 3. Past Continuous Tense 1. 2. 3. Past Perfect Tense 1. 2. 3. Future Simple Tense 1. 2. 3. TENSES EXAMPLES SIGNAL WORDS Present Simple Tense 1. He speaks English 2. 3. Present Continuous Tense 1. 2. 3. Present Perfect Tense 1. 2. 3. Past Simple Tense 1. 2. 3. Past Continuous Tense 1. 2. 3. Past Perfect Tens...
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TENSES | EXAMPLES | SIGNAL WORDS |
Present Simple Tense | 1. We go to school. 2. 3. |
|
Present Continuous Tense | 1. 2. 3. |
|
Present Perfect Tense
| 1. 2. 3.
|
|
Past Simple Tense
| 1. 2. 3. |
|
Past Continuous Tense | 1. 2. 3. |
|
Past Perfect Tense | 1. 2. 3. |
|
Future Simple Tense
| 1. 2. 3. |
|
TENSES | EXAMPLES | SIGNAL WORDS |
Present Simple Tense | 1. He speaks English 2. 3. |
|
Present Continuous Tense | 1. 2. 3. |
|
Present Perfect Tense
| 1. 2. 3. |
|
Past Simple Tense
| 1. 2. 3. |
|
Past Continuous Tense | 1. 2. 3. |
|
Past Perfect Tense | 1. 2. 3. |
|
Future Simple Tense
| 1. 2. 3. |
|
Chuyển sang Câu bị động theo 2 CÁCH
1. He sent the girl a letter.
(1) =>
(2) =>
2. She is showing her friends the new computer.
(1) =>
(2) =>
3. Her mother often tells the girl tale stories.
(1) =>
(2) =>
4. They will pay you $500.
(1) =>
(2) =>
rút gọn biểu thức căn 10 - căn 2/căn 5 - 1 + 2 - căn 2/căn 2 - 1
1 + 1 =
2 + 2 =
25 tháng 12 2023 lúc 14:34
1) Rút gọn các biểu thức sau:a) sqrt[3]{27} - sqrt[3]{-8} - sqrt[3]{125}b) sqrt{20} - sqrt{45} + 3sqrt{18} + sqrt{72}c) 2sqrt{5} + sqrt{left(1-sqrt{5}right)^2} d) dfrac{1}{sqrt{3}+1} + dfrac{1}{sqrt{3}-1} - 2sqrt{3}e) dfrac{a-b}{sqrt{a}-sqrt{b}} - dfrac{sqrt{a^3}-sqrt{b^3}}{a-b} với a ≥ 0 , b≥0 , a ≠ b
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1) Rút gọn các biểu thức sau:
a) \(\sqrt[3]{27}\) - \(\sqrt[3]{-8}\) - \(\sqrt[3]{125}\)
b) \(\sqrt{20}\) - \(\sqrt{45}\) + 3\(\sqrt{18}\) + \(\sqrt{72}\)
c) 2\(\sqrt{5}\) + \(\sqrt{\left(1-\sqrt{5}\right)^2}\)
d) \(\dfrac{1}{\sqrt{3}+1}\) + \(\dfrac{1}{\sqrt{3}-1}\) - 2\(\sqrt{3}\)
e) \(\dfrac{a-b}{\sqrt{a}-\sqrt{b}}\) - \(\dfrac{\sqrt{a^3}-\sqrt{b^3}}{a-b}\) với a ≥ 0 , b≥0 , a ≠ b
1-2. 𝘾𝙝𝙤𝙤𝙨𝙚 𝙩𝙝𝙚 𝙬𝙤𝙧𝙙 𝙬𝙝𝙤𝙨𝙚 𝙪𝙣𝙙𝙚𝙧𝙡𝙞𝙣𝙚𝙙 𝙥𝙖𝙧𝙩 𝙞𝙨 𝙥𝙧𝙤𝙣𝙤𝙪𝙣𝙘𝙚𝙙 𝙙𝙞𝙛𝙛𝙚𝙧𝙚𝙣𝙩𝙡𝙮 𝙛𝙧𝙤𝙢 𝙩𝙝𝙖𝙩 𝙤𝙛 𝙩𝙝𝙚 𝙤𝙩𝙝𝙚𝙧𝙨 𝙞𝙣 𝙚𝙖𝙘𝙝 𝙜𝙧𝙤𝙪𝙥.Question 1. *1 điểm A. conce̲ntrate B. te̲nse C. stre̲ssed D. se̲lf-awareQuestion 2. *1 điểm A. deli̲ghted B. deci̲sion C. advi̲ce D. helpli̲ne
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1-2. 𝘾𝙝𝙤𝙤𝙨𝙚 𝙩𝙝𝙚 𝙬𝙤𝙧𝙙 𝙬𝙝𝙤𝙨𝙚 𝙪𝙣𝙙𝙚𝙧𝙡𝙞𝙣𝙚𝙙 𝙥𝙖𝙧𝙩 𝙞𝙨 𝙥𝙧𝙤𝙣𝙤𝙪𝙣𝙘𝙚𝙙 𝙙𝙞𝙛𝙛𝙚𝙧𝙚𝙣𝙩𝙡𝙮 𝙛𝙧𝙤𝙢 𝙩𝙝𝙖𝙩 𝙤𝙛 𝙩𝙝𝙚 𝙤𝙩𝙝𝙚𝙧𝙨 𝙞𝙣 𝙚𝙖𝙘𝙝 𝙜𝙧𝙤𝙪𝙥.Question 1. *1 điểm A. conce̲ntrate B. te̲nse C. stre̲ssed D. se̲lf-awareQuestion 2. *1 điểm A. deli̲ghted B. deci̲sion C. advi̲ce D. helpli̲ne
1+1=?
2+2=?
3+3=?
5878649.0+546.1=?
dịch câu sau ra tiếng anh:cấm tra google dịch
ngày xửa ngày xưa có 1 og lão đánh cá nghèo khổ
ONE WORD FOR THREE:1. …………………….1. I expect we’ll again one day, but bye for now.2. The company’s service didn’t ________ my requirements.3. You’re going to ________ a lot of problems as you go through life.2. …………………….1. My grandmother was strict, but the advice she gave me was always ________, and I did my best to follow it.2. She tossed and turned for several hours and then towards morning she fell into a ________ sleep.3. The bodywork of the car appears to be quite ________, but the e...
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ONE WORD FOR THREE:
1. …………………….
1. I expect we’ll again one day, but bye for now.
2. The company’s service didn’t ________ my requirements.
3. You’re going to ________ a lot of problems as you go through life.
2. …………………….
1. My grandmother was strict, but the advice she gave me was always ________, and I did my best to follow it.
2. She tossed and turned for several hours and then towards morning she fell into a ________ sleep.
3. The bodywork of the car appears to be quite ________, but the engine definitely needs replacing.
3. …………………….
1. We are hoping to ________ a good deal of money with this scheme.
2. The purpose of the campaign is to ________ awareness of some very important issues.
3. He speaks quietly simply because he does not wish to ________ his voice.
4. …………………….
1. Everybody who read the articles must have been ________ by the courage shown by the little boy in the face of such adversity.
2. Mr and Mrs Davenport bought a house in France a few years ago and ________ there once they had retired.
3. It was clear from the graceful way in which the girl ________ that she had had ballet training.
5. ……………………
1. The most memorable ________ we visited was the Piazza Navona.
2. I am the only one in my family whose ________ is normal.
3. When the road sign came in ________ I realised I only had a few kilometres of my journey to go.
6. …………………….
1. The refugees are finding it difficult to ________ to their new surroundings.
2. The management has revised company policy to ________ the demands of its workers.
3. The hotel is not large enough to ________ the star and his entourage.
7. …………………….
1. The peacock strutted around proudly, the ________ of his tail a beautiful sight.
2. I’m a great ________ of country and western music.
3. Switch on the ________ if you are cooking in the kitchen.
8. …………………….
1. Could you add this up for me? I’m no good at all with ________.
2. The cocktail party was attended by several well-known public ________.
3. Models have to watch their ________ all the time so they eat very carefully.
9. …………………….
1. Despite one or two problems, Ian’s travels were, for the most ________ thoroughly enjoyable.
2. I accept that it was foolish on my ________ to get involved in something so risky.
3. Ambition played an integral ________ in his downfall.