Tìm min hoặc max : G=1-x^2+xy-y^2 H=2x^2+y^2-2xy-2x-9

Bằng cách nêu dấu hiệu đặc trưng , hãy viết tập hợp A các số tự nhiên nhỏ hơn 10

Giải giúp mik với ạ có kèm giải thích nx thì càng tốt ạ

1. Yesterday, Mai and her parents (go) ………went……………………………………………. shopping. 2. I would like (tell) ………to tell…………………………………………………you about my family. 3You are sick, so you should (go)……………………………………………………. to the doctor. 5. When Lan’s father (be) …was …………………… young. He (drink) ……………used to drink………………………… a lot of wine. 6. Her family always (watch) ……watches………………………. TV in the evening 7. Thirty years ago, very few people (have)…..........had........................................TV sets. 9. We went to the doctor because we (be) …………………………………………sick. 10. What would you like (watch) …………………………………………………………………………...?

101. Ben and his brother are so alike that I sometimes get them mixed up. (such)  Ben bears _________________________________________________________________________________ 102. They have converted the old station into a smart restaurant. (transformed)  The old station ___________________________________________________________________________ 103. I didn‟t know what to expect at the first rehearsal as I hadn‟t read the script. (having)  Not _______________________________________________________________________________________ 104. Amy didn‟t realise how noisy her neighbourhood was until she moved away. (moving)  Only _____________________________________________________________________________________ 105. A list of recommendations is still being prepared by the committee. (drawing)  The committee __________________________________________________________________________ 106. Lily promised that she is going to help me set up the equipment. (word)  Lily ________________________________________________________________________________________ 107. No matter what happens, Jane will never forgive Mark for what he did. (ever)  Under _____________________________________________________________________________________ 108. Trudy is such an optimist - even in the most difficult situations. (side)  Trudy manages to ______________________________________________________________________ 109. Harry is the spitting image of his mother! (resemblance)  Harry ___________________________________________________________________________________ 110. I once saw Madonna - just for a second - as she got into her limo. (glimpse)  I once ___________________________________________________________________________________

Bài 5: Cho tam giác nhọn ABC(AB<AC) đường cao AH. Gọi M,P,Q lần lượt là trung điểm của BC,Ca,AB. Cmr: a) PQ là đường trung trực của AH b) Tứ Giác MPQH là hình thang cân

https://f41-zpg.zdn.vn/4379914510272832953/9c2c7b72d8692e377778.jpg giup toi voi cop link len google roi bat voi lam roi

Bài 2: Cho mạch điện như hình dưới đây. Biết R1 = 3 Ω, R2 = R4 = 12 Ω. Một nguồn điện có hiệu điện thế U = 36 V không đổi được nối vào hai đầu A và B của mạch điện. a) Cho R3 = 3 Ω, tìm cường độ dòng điện qua R3. b) Biết cường độ dòng điện qua R3 là 0,5 A. Tìm R3.

Chứng tỏ rằng các phương trình sau đây vô nghiệm: a, 2(x + 1) = 3 + 2x b, 2(1 – 1,5x) + 3x = 0 c, |x| = -1

I. Reported speech: proposed, offered, promised, threatened, denied, admitted 1. “Shall I pump thee water out of the tank, Mary,” Jane said. - _____________________________________________________ 2. Jack said, “Shall we make a tour of the town?.” - _____________________________________________________ 3. “I am afraid of heights,” Linda said. - _____________________________________________________ 4. “I didn’t doing anything to harm them?” said Tom. - _____________________________________________________ 5. “I’ll leave you alone unless you stop crying,” her brother said.. - _____________________________________________________ 6. Peter said to his sister, “I’ll give you a reward if you pass the entrance exam.” - __________________________________________________