a) `x:(-1/2)^3=-1/2`
`↔x=(-1/2).(-1/2)^3`
`↔x=(-1/2)^4`
`↔x=1/16`
b) `(3/4)^5 . x=(3/4)^7`
`↔x=(3/4)^7:(3/4)^5`
`↔x=(3/4)^2`
`↔x=9/16`
Đáp án:
`a)`
` x : (-1/2)^3 = -1/2`
` x = -1/2 * (-1/2)^3`
` x = (-1/2)^4 = (1/2)^4`
` x = 1^4/2^4 = 1/16`
`b)`
` (3/4)^5 * x = (3/4)^7`
` x= (3/4)^7 : (3/4)^5`
` x= (3/4)^2`
` x = 9/16`
càng lạ hơn nữa từ sau hôm gặp sứ giả chú bé lớn nhanh như thổi cơm ăn mấy cũng chẳng no áo vừa mặc xong đă căng đứt chỉ.Hai vợ trồng làm ra bao nhiêu cũng chẵng đủ nuôi con đành nhờ bà con ,làng xóm .Bà con đều vui mừng góp gạo nuôi câu bé vì ai cũng mong chú giết giặc cứu nước hãy tìm từ mượn
hãy trả lời câu hỏi này: Kể chị Dậu linh tinh đoạn văn ngắn tí tẹo thôi
Cảm ơn ạ , cam bị vỡ nên khó nhìn lắm ạ
Giúp tui với :( có 1 vài câu tôi làm những không chắc nha
Số nguyên x nhỏ nhất thỏa mãn 2/x = x/8 là: giúp tui đi nhanh lên
cho 1g bột sắt tiếp xúc với oxi sau mot thoi gian thay kl bot da vuot qua 1,41 g.neu chi tao thanh 1 oxit sat thi do la oxit nao
Giúp em bài 1;2 với ạ Em đanh cần gấp 🙏🙏🙏
l wash the dishes every ...........................
√10x-x ²-16 +3 = 3√x-2 + √8-x Tính. Đây là pt vô tỉ nha
Giúp mình nhanh với ạ Exercise 1: Chọn phương án đúng You don't look well. You see a doctor. could B. need to C. are to D. should She home yesterday because her little son was sick. could have stayed B. must have stayed C. had to stay D. should have stayed You disturb him during his work! should not B. needn't C. mustn't D. don't have to Whose car is this? – It be Anton's. I think I saw him driving a red car like this one. could B. might C. must D. would Though he was ill and weak, he get out of the burning building. was able to B. might C. could D. should lending me your CD player for a couple of days? The windows look clean. You wash them. are not to B. needn't C. don't have to D. mustn't I don't believe it. It be true. can't B. mustn't C. shouldn't D. wouldn't Young people obey their parents. must B. may C. will D. ought to Jenny's engagement ring is enormous! It have cost a fortune. must B. might C. will D. should You to write them today. should B. must C. had D. ought " you hand me that pair of scissors, please?" May B. Will C. Shall D. Should Jeanette did very badly on the exam. She harder. must have studied B. could have studied C. should have studied D. must studied Marcela didn't come to class yesterday. She an accident. should have had B. must have C. might have D. may have had John still hasn't come out. He everything for the trip now. must have been preparing B. must be preparing C. will be preparing D. will have prepared Thomas received a warning for speeding. He so fast. shouldn't have driven B. should have C. would have driven D. might have driven The photos are black. The X-ray at the airport them. should have damaged B. would have damaged C. would damage D. must have damaged Tom didn't do his homework, so the teacher became very angry. He his homework. must have done B. should have done C. might have D. will have done My car stopped on the high way. It out of gas. may run B. must be C. may have run D. should have run I be here by 6 o'clock? - No, you Shall; mightn't B. Must; needn't C. Will; mayn't D. Might; won't Exercise 2: Chọn phương án đúng “Where do you think Rooney is today?". "I have no idea. He late." should have left B. would sleep C. would have sleep D. may have slept A. had to choose B. must have chosen C. should have chosen D. could have been choosing The children "thank you" to you when you gave them their gifts. will have said B. should have said C. must say D. should say If we had known your new address, we to see you. came B. will come C. would have come D. would come These two boys look identical. They twins. must have been B. should be C. must be D. should have been You've been working non-stop for ten hours. You be really tired. should B. must C. would rather D. ought to The fortune teller predicted that inherit a big fortune before the end of this year. will B. she will C. would D. she would I'm feeling very tired this morning. I have stayed up late last night. couldn't B. shouldn't C. mustn't D. to stopping He helped her, but it was not necessary. He needn't her. help B. to help C. be helping D. have helped " you like to play a game of tennis?" "I'd love to." Could B. Will C. Do D. Would His letter is full of mistakes. He the mistakes carefully before sending it. must have checked B. should have checked C. could have checked D. can have checked "I bought two bottles of milk." "You have bought milk; we have heaps of it in the house." couldn't B. needn't C. mustn't D. hadn't When I first went to England, I English, but I it. can read; can't speak B. can read; couldn't speak C. could read; couldn't speak D. could read; can't speak The car plunged into the river. The driver out but the passengers were drowned. is able to get B. could get C. was able to get D. can get I got lost and ask a policeman the way. have to B. must have to C. had to D. would We have some days off after the exam spend some time together? Let B. Shall I C. Shall we D. Would you like You ring the bell; I have a key. may not B. needn't C. mustn't D. couldn't You drink this; it's poison. must B. needn't C. mustn't D. shouldn't Nobody knows how people first came to these islands. They have sailed from might B. must C. should D. had She felt ill and leave early. has to B. must C. had to D. ought
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