... giả thi t b i toán B i Cho x, y, z l số thực thỏa m n điều kiện : x + y + z + xy + yz + zx = Chứng minh : x2 + y2 + z2 - 31 - Toan6789.wordpress.com ON THI VAO LOP 10 đề số 44 Đề thi v o 10 ... đỏ ngửa lên phía đợc hay không ? Tại ? đề số 51 Đề thi tuyển sinh v o lớp 10 chuyên Toán Tin năm 2003-2004 Đại học s phạm HN B i Chứng minh biểu thức sau có giá trị không phụ...
... thức P = x + y 25 II - ĐỀ ÔN THI TUYỂN SINH LỚP 10 CHUYÊN TOÁN ĐỀ SỐ Câu 1: Giải phương trình: 2 a) x + ÷− x - ÷− = x x b) ( ) )( x + − x + + x + 7x + 10 = Câu 2: a) Cho số a, ... minh tồn hình tròn có bán kính chứa không 50 điểm ĐỀ SỐ Câu 1: a) Tìm số hữu tỉ x, y thỏa mãn đẳng thức: x ( 2011 + 2 010) + y( 2011 − 2 010) = 20113 + 2 0103 b) Tìm tất số nguyên x > y > z...
... worked I don’t know how to drive this car I wish I it a could drive b drive c can d will drive 10 How is your house from here? a many b much c long d far 11 He thinks we’ve invited too many ... that you are self-confident All this affects the way you feel about someone Also, a stranger may remind you of a meeting with someone This may be because of something as simple as the fact that ... a...
... Listen to this ! I think this news (surprise) you Question 3: Use the correct form of the words in brackets to complete sentences He is looking thinner ( appreciate) The water in this lake is ... himself C : as soon as 10 C: does he 15 B : twice as much Question 5: (10 points) of in from in on of but like or 10 doing Question 6: ( points) b b c c 45 a Question 7: ( 10 points) a)(5 poin...
... to students in this classroom Everybody (think) that Jack was the laziest of all the pupils Unless he (ask) you, don’t give him anything What (happen) if I press this button? Tom wondered ... lived in DaNang once But I don’t live there anymore → I used 10. This is my second visit to Nha Trang → This is the second time Question V: Fill in each black with the correct ... hit his head on the r...
... B at talking C talking D talk How long ago _? A has this house built B was this house built C this house built D this house was built 10 I want you _ me alone A leave B leaving C left D to ... to be discovered D unlikely to be discovered 27 Who _? A was this book written B wrote this book by C was this book written by D this book was written by 28 If it _ fine tomorrow, we'll go ... 45 Dien...
... Listen to this ! I think this news (surprise) you Question 3: Use the correct form of the words in brackets to complete sentences He is looking thinner ( appreciate) The water in this lake is ... himself C : as soon as 10 C: does he 15 B : twice as much Question 5: (10 points) of in from in on of but like or 10 doing Question 6: ( points) b b c c a Question 7: ( 10 points) a)(5 points)...
... 12.Listen to this ! I think this news (surprise) you Question 3: Use the correct form of the words in brackets to complete sentences He is looking thinner ( appreciate) The water in this lake is ... friend isn't That car's so expensive, I don’t think I can buy it - It's such I've never heard a more amusing story than this one - This is I was on the point of leaving the ... report when you (a...
... Listen to this ! I think this news (surprise) you Question 3: Use the correct form of the words in brackets to complete sentences He is looking thinner ( appreciate) The water in this lake is ... friend isn't That car's so expensive, I don’t think I can buy it - It's such I've never heard a more amusing story than this one - This is I was on the point of leaving the ... report when you (arri...
... viên:Tôn Nữ Bích Vân Bài giải: Bài 1: Điều kiện a > a ≠ a a −1 − K= : a + + ( a + 1)( a − 1) a ( a − 1) = a −1 a +1 : a ( a − 1) ( a + 1)( a − 1) = a −1 a −1 ( a − 1) ... Giáo viên:Tôn Nữ Bích Vân Theo giả thi t ta có phương trình x + y = 600 x Số sản phẩm tăng tổ I là: 100 (sản phẩm) 21 y Số sản phẩm tăng tổ II là: 100 ( sản phẩm) 18 21 x+ y...
... Giáo viên:Tôn Nữ Bích Vân Giải: Bài 1: x (2 − x ) + 8x ( x −1) − 2( x − 2) : (2 + x ) (2 − x ) x ( x − 2) a P = x + 4x : ( + x ) (2 − x ) = 3− x x ( x − 2) x + 4x x ( x − 2) = (2 + x ) (2 − x ) − ... 3x − y = 2 010 3x − y = 2 010 y = 20 07 x = 20 08 Vậy với m = hệ phương trình cho có nghiệm y = 20 07 b Giáo viên:Tôn Nữ Bích Vân mx − y = y = mx − ⇔ x y...
... y = 2x - vào phương trình 9x + 8y = 34 ta được: 25x = 50 ⇔ x = Từ ta có y = x = Nghiệm hệ phương trình cho y = Bài 3: a) Phương trình: x2 - 2mx + (m - 1 )3 = với x ẩn số, m tham số. (1) Khi ... a, c < a ⇒ a + b+ c < 3a ⇒ a + b + c 3a a a > = ⇒ a + b + c 3a (3) r < < Từ (1); (2); (3) ta có: R Giáo viên:Tôn Nữ Bích Vân-Trường THCS Nguyễn Khuyến Đà Nẵng *Ghi chú: Câu 3b 4d câu nâng...
... Diện tích tam giác ABC: S = AB.CH = 4. 6 = 12 (đvdt) Bài 4: Gọi chi u cao cạnh đáy tam giác cho x y (x > 0; y > 0, tính dm) Diện tích tam giác là: xy (dm2) Chi u cao x – (dm); cạnh đáy y + (dm); ... = =4 Vậy phương trình có nghiệm: x1 = 1; x2 = a Bài 3: Giáo viên:Tôn Nữ Bích Vân- Trường THCS Nguyễn Khuyến Đà Nẵng a) Vẽ đồ thị (P): y = –2x2 Bảng giá trị: x y –2 –8 –1 –2 0 2 Đồ thị hàm...