Đáp án:
Giải thích các bước giải:Bài 1:27^3 . 9^2 : 3^6⇒ (3^3)^3 . (3^2)^2 : 3^6⇒ 3^9 . 3^4 : 3^6⇒ 3^13 : 3^6⇒ 3^7Bài 2:n=2 ; 3 ; 4 ; 5Tìm số n nào??
Giải thích các bước giải:
`A = 27^3 . 9^2 : 3^6`
`A = 19683 . 81 : 729`
`A = 2187`
`15^5 : 5^3 : 3^9`
`= 6075 : 19683`
`= 25/81`
`.............`
`3 < 3^n ≤ 243`
`3^1 < 3^n ≤ 3^5`
`=> n ∈ {2; 3; 4; 5}`
1- Hãy nêu đặc điểm vị trí địa lí, kích thước của lãnh thổ châu Á và nêu ý nghĩa của vị trí địa lí đối với khí hậu ? 2- Địa hình châu Á có những đặc điểm gì?
tính giá trị của biểu thức: 1/1*2 + 2/2*4 + 3/4*7 + 4/7*11 + 5/11*16 + 6/16*22 + 7/22*29
Can you crack the code from the following hints? Hint #1: 682 - One digit is right and in its place Hint #2: 614 - One digit is right but in the wrong place Hint #3: 206 - Two digits are right but both are in the wrong place Hint #4: 738 - All digits are wrong Hint #5: 380 - One digit is right but in the wrong place Share it if you Cracked the code!!! -------------d the code!!!
Tìm các số tự nhiên x và y (x < y) sao cho: 2^x + 2^y = 20
Phân tích vẻ đẹp nhân vật chị dậu trong đoạn trích "tức nước vỡ bờ" yêu cầu : ko ngắn cũng ko dài nhé, vừa vừa thôi bài văn mới hoàn toàn, cấm chép mạng, nếu ko sẽ báo cáo giải nhanh nha, em cần gấp lắm => các idol văn học vào giải em cái, em cần gấp, em sẽ vote 5* và câu tlhn
ai giúp mình với ạ.Hứa vote 5 sao:3
mn help em vớiiiiii 79. _______ still puzzles me. A) He got selected president B) Where they got the idea from C) He has got a lot of money D) How can they beat us 80. I don’t know much about art but I know_______. A) what I like B) who is a good artist C) what is it like D) why are people paying that much 90. It is desirable that no one else _______ about the problem. A) doesn’t know B) know C) to know D) will know 91. That she was chosen Miss Turkey _______. A) made me happy B) nobody was glad about it C) everybody approved it D) everyone present voted in her favor 92. Whether they do it or not _______. A) don’t make any difference B) depends on various factors C) created a big problem D) will cause a lot of disturbance 93. I am satisfied _______. A) that she came third in the competition. B) it was our victory against enemies C) what you promised to do D) will make her happy, I believe 94. The fact that they blamed us for the accident _______. A) which was not our fault B) was surprising C) at which a person was killed D) I wasn’t involved 95. _______ is a fact. A) That the poor have a hard life B) The world is round C) He came first D) What is he saying 96. Did _______ help him in his career? A) the fact that his father was a professor B) he was rich and friendly C) that he won a scholarship D) his teacher recommended him 97. It is incredible that _______. A) she study very hard B) will be the result C) he undergo an operation D) he has passed his exams 98. It is necessary that everyone _______ here on time. A) will be B) be C) are D) to be 99. “If I were you, I’d open a bank account because interest is high now” I told her. I suggested that she _______ a saving account. A) would open B) will open C) open D) had opened 100. Our teacher wishes he _______ another profession. A) chose B) had chosen C) would choose D) has chosen
Khi nào tính điện trở tưởng đương của đoạn mạch nối tiếp song song
giải giúp mình vs mình cần gấp
mn giúp em bài này với ạ, em đg cần gấp, em sẽ vote sao đầy đủ và tim ạ a, kể tên hình tam giác b, kể tên hình vuông c, gọi tên các đoạn thẳng trong hình d, số đo của góc: APD; MNB Bài này có mỗi 20 điểm thôi ạ
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