$\\$
`a,`
`x^{64}=x`
`->x^{64}-x=0`
`-> x (x^{63}-1)=0`
Trường hợp 1 :
`->x=0`
Trường hợp 2 :
`-> x^{63}-1=0`
`->x^{63}=1`
`->x^{63}=1^{63}`
`->x=1`
Vậy `x=0` hoặc `x=1`
`b,`
`x^{28}=x^5`
`->x^{28}-x^5=0`
`->x^5 (x^{23}-1)=0`
`->x^5=0`
`->x^{23}-1=0`
`->x^{23}=1`
`->x^{23}=1^{23}`
`a) x^64 = x`
`→ x^64 - x = 0`
` x . x^63 - x = 0`
` x . (x^63 - 1) = 0`
`→ x = 0`` hoặc` `x^63 - 1 = 0`
`x^63 - 1 = 0`
`x^63 = 1`
`→ x = 1`
`⇒ x ∈ {1; 0}`
`b) x^28 = x^5`
`→ x^28 - x^5 = 0`
` x^5 . x^23 - x^5 = 0`
` x^5 . (x^23 - 1) = 0`
`→ x^5 = 0``hoặc`` x^23 - 1 = 0`
`x^5 = 0`
`→ x = 0`
`x^23 - 1 = 0`
`x^23 = 1`
V/ Write the correct preposition to fill in the blank. 1. Could I help you ______________ your bag? 2. Na got up late this morning because her alarm clock didn’t go ___________ . 3. I’m looking forward ____________ seeing you in June. 4. In the competition, everyone fell ______________ the deep and dangerous water. 5. Ha Long Bay is recognized _____________ UNESCO as a World Heritage Site 6. They have a meeting ___________ 6.30 and 9.30. 7. My mother often picks me ___________ from the school. 8. I’m going to invite my friends to come over ___________ dinner tonight. 9. Next summer, my family will have a vacation __________ Thailand and stay there ________ one week. Chi tiết giúp mình nha
Mọi người giải giúp mình với. Mình cảm ơn
Điền mạo từ ‘a’, ‘an’ hoặc 0 vào chỗ trống sao cho thích hợp. 1. She asked me for ___ information about the meeting. 2. They will move to _a__ mansion next month. 3. I’d like _a__ grapefruit and ___ orange juice. 4. _an__award was given to Jim yesterday. 5. We read ___ books and play ___ games when we have free time. 6. Jim doesn’t want to borrow ___ money from anyone. 7. My friend and I threw _a__ party last week. 8. It was __an_ honor to be invited here today. 9. I’ve bought _an__ umbrella for my sister. 10. My family often have____ eggs for breakfast. 11. Would you like__a____cup of tea? 12. My brother doesn’t like ______ cats. 13. Is there ___a_______post office here? 14. I spend _________hours on my DIY project. 15. Mr. Peter used to be ______a_____famous vet.
IV/ Write the correct form of verb to fill in the brackets Nowadays, a lot of important inventions (1- carry out) by scientists (2- work) for large industrial firms. However, there (3 – be) still opportunities for other people (4 – invent) various things. In Britain, there is a weekly TV program which (5 – attempt) to show all the devices which people (6 – invent ) recently. The people (7 – organize) the program receive information about 700 inventions per year. New ideas can (8 – develop) by private inventors. However, it is important (9 – consider) these questions : Will it work? Will it (10 – want)? Is it new? 1. __________________ 6. ___________________ 2.__________________ 7. ___________________ 3. __________________ 8. ___________________ 4. __________________ 9. ___________________ 5. __________________ 10. __________________ Chi tiết giúp mình nha
Ai giúp mình giải đề này với ạ , cảm ơn!
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một trường tổ chức cho học sinh đi tham quan di tích lịch sử . đợt thứ nhất cần có 3 xe ô tô để chở 120 học sinh. Hỏi đợt hai muốn chở 160 học sinh đi tham quan thì cần dùng mấy xe ô tô như thế? ( tóm tắt nữa)
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