đề thi toán bằng tiếng anh

... integers such that the product of the numbers of any pair plus the half of one of the numbers plus one third of the other number is three times less than 15. Q13. Let be given ∆ABC with area (∆ABC) = ... integers such that the product of the numbers of any pair plus the half of one of the numbers plus one third of the other number is 7 times less than 2009. 1.3. Hanoi Open Mathematical Olympiad 2008...

Ngày tải lên: 18/02/2014, 11:20

Ngày tải lên: 18/02/2014, 11:20

... Now that 16x + 1 = (x 2 − y 2 ) 2 = (x −y) 2 (x + y) 2 ≥ x 2 . From this we obtain the inequality, x 2 − 16x − 1 < 0. Solving this inequality gives x ∈ {0, 1, ··· ,16}. In addition, 16x + 1 is ... y) = |x − y| + |x 3 − y 3 | when x, y vary satisfying the restriction x 2 + y 2 = 1. Rewriting this as f(x, y) = |x − y|(1 + x 2 + xy + y 2 ) = |x − y|(2 + xy). from which we square to arrive ... xy 3  3 =  5 3  3 . Hence, f(x, y) ≤ 5 3 .  5 3 . Equality occurs when xy = − 1 3 , x 2 + y 2 = 1. This simultaneous equations are equivalent to xy = − 1 3 , x + y = 1 √ 3 . 5 Hanoi Open Mathematical...

Ngày tải lên: 18/02/2014, 11:20

Ngày tải lên: 19/03/2015, 10:30

... BANG B * 2009-2010 * ĐỀ CT SỞ GIÁO DỤC VÀ ĐÀO TẠO KỲ THI CHỌN HỌC SINH GIỎI CẤP TỈNH KHÁNH HÒA NĂM HỌC 200-2010   Môn thi : TIẾNG ANH – THPT (Bảng B) Ngày thi : 06/04/2010 (Thời ... done nothing more exciting than work at home, read the 00 …….  ……… newspaper and watch television. I had begun feeling bored with this 66. ……… and so, last weekend I thought I would do something ... will _______________________________________________ Page 6 of 7 * HSG 12 BANG B * 2009-2010 * ĐỀ CT (104) ………… our daily life we need to communicate with (105) ………… We need to do this mostly by speaking to other people and listening...

Ngày tải lên: 11/10/2013, 06:11

Ngày tải lên: 03/11/2013, 05:02

Ngày tải lên: 03/11/2013, 05:03

Ngày tải lên: 03/11/2013, 05:03

Ngày tải lên: 18/02/2014, 11:20

... Đề thi trắc nghiệm tiếng anh bằng A-0048 1) The window was shut, and he ________ to open it. a) did even not...

Ngày tải lên: 28/07/2014, 00:21

... swimming c) swim d) to swim 6) There is nothing very ________ to do in that small town. a) enjoy b) enjoyable Đề thi trắc nghiệm tiếng anh bằng A-0047 1) ________ a letter here for...

Ngày tải lên: 28/07/2014, 00:21

... no c) any d) not 4) - What are you doing? - ________ . a) No b) None c) Not d) Nothing 8) Praja returned home as ________ as he could. a) quick b) quicker c) quickly d)...

Ngày tải lên: 28/07/2014, 00:21

... He b) We c) You d) They 7) This book belongs to me, and this pen is ________, too. a) his b) me Đề thi trắc nghiệm tiếng anh bằng A-0043 1) - Is this your handbag? - ________? a)...

Ngày tải lên: 28/07/2014, 00:21

... she ________ a bicycle. a) can rode b) can ride c) could ride d) could rode Đề thi trắc nghiệm tiếng anh bằng A-0041 1) Have you read ________ paper? a) today b) today's c) of ... enough for a) each other b) themselves c) oneself d) one another 8) Our people began this flight ________ 1973. a) from b) at c) since d) in 6) They went from one shop to ________....

Ngày tải lên: 28/07/2014, 00:21

... the art class were doing self-portraits by looking at ________ in the mirror. Đề thi trắc nghiệm tiếng anh bằng A-0040 1) Have you read ________ paper? a) today b) today's c) of ... d) in today a) each other b) themselves c) oneself d) one another 8) Our people began this flight ________ 1973. a) from b) at c) since d) in a) is b) are c) has d) have 5)...

Ngày tải lên: 28/07/2014, 00:21

... c) have d) got 3) - I haven't got anything for you. - ________! a) Never mind b) It isn't the matter c) Nothing d) Not problem 4) I often spend two hours ________ ... 6) Give it to ________. It's my pencil. a) I b) me c) my d) mine 7) I don't think he ________ flowers very much. a) like b) liking a) is b) it c) it's d) is...

Ngày tải lên: 28/07/2014, 00:21

... d) long 6) ________ your brother spend Christmas with you? a) do b) does Đề thi trắc nghiệm tiếng anh bằng A-0038 1) There isn't ________ left. a) enough sugar b) sugar enough ... how's d) when 9) Can you ________ on the light, please? a) switch b) switches a) these b) this c) those d) there 3) I'm tired ________ waiting for him. a) from b) for c) of...

Ngày tải lên: 28/07/2014, 00:21

... every d) The whole 9) We hire out bicycle ________. a) by hours b) by an hour Đề thi trắc nghiệm tiếng anh bằng A-0037 1) I live about twenty km ________ here. a) away of b) away from c)...

Ngày tải lên: 28/07/2014, 00:21

... Good-bye c) Good evening Đề thi trắc nghiệm tiếng anh bằng A-0036 1) You must ________ your work as soon as possible. a) started b) start c) to start d) to start to 2) This man has a ________....

Ngày tải lên: 28/07/2014, 00:21

Ngày tải lên: 28/07/2014, 00:21