luyen thi toan lop 12

... tính ch ẵ n l ẻ , tính tu ầ n hoàn (n ế u có)). 2) Kh ả o sát s ự bi ế n thi n hàm s ố a) Xét chi ề u bi ế n thi n c ủ a hàm s ố ã Tớnh ủ o hm ã Tỡm cỏc ủ i m t i h n ( ð i ể m ... bi n thi n hm s ố trong m ỗ i kho ả ng ( ðồ ng bi ế n n ế u )x(f ′ >0, ngh ị ch bi ế n n ế u )x(f ′ <0). b) Tính các c ự c tr ị (suy ra ngay t ừ ph ầ n xét chi ề u bi ế n thi n) ... th ị hàm s ố l ồ i trên kho ả ng ñ ó) e) L ậ p b ả ng bi ế n thi n (ghi t ấ t c ả các k ế t qu ả tìm ñượ c vào b ả ng bi ế n thi n) 3)V ẽ ủ th ã Chớnh xỏc húa ủ th (tỡm giao...

Ngày tải lên: 12/09/2012, 16:21

... 7485632 33113 I(tt)dtttC(5t8t)tC 8885320 ổử =-=-+=-+ ỗữ ốứ ũ 22222 3 3 [5(12x)8(12x)](12x)C 320 = + 4222 3 3 (20x4x3)(12x)C. 320 = + Ví dụ 7: Tính tích phân bất định: 3 Isinxcosxdx.= ũ Giaỷi: ... ủũnh: 522 3 Ix(12x)dx.=- ũ Giaỷi: ẹaởt: 3 3 22 1t t12xx 2 - =-ị= . Suy ra: 2 3 2xdxttdt, 2 =- 3 5222222274 33 1t33 x(12x)dxx(12x)xdx.ttdt(tt)dt. 248 - ổử -=-=-=- ỗữ ốứ Khi ủoự: 7485632 33113 I(tt)dtttC(5t8t)tC 8885320 ổử =-=-+=-+ ỗữ ốứ ũ ... pheựp ủaởt: 2n2n1 12ntdt udu (t1)(t1) dvdtvt + ỡỡ ==- ùù ị ớớ ùù == ợợ Khi ñoù: 22 n 2n2n12n2n1 ttdtt[(t1)1]dt J2n2n (t1)(t1)(t1)(t1) ++ -+ =+=+ òò nn1 2n2n2n12n tdtdtt 2n2n(JJ) (t1)(t1)(t1)(t1) + + éù =++=++ êú ...

Ngày tải lên: 12/09/2012, 16:21

Ngày tải lên: 04/06/2013, 01:25

... no word is needed 60.Working for 12 hours a day _________ her very tired. a. makes b. made c. make d. making a. shall have b. will have c. had d. has 12. In interactions in international ... salary. She has worked hard. a. reason b. unreasonable c. reasonable d. unreasonably 16.Is this a hotel? - No, it's a ________ house. a. possess b. possession c. private d. his 17.The ... 36.Imagination ________ facts. a. outplays b. outlays c. outruns d. outlives 37.Is there anything important _____ first? a. doing b. done c. to do d. do 38.People save money __________...

Ngày tải lên: 21/06/2013, 01:25

... director of this company? a. is b. was c. were d. has been 46.Pick out the word which has the underlined part pronounced differently from the rest a. although b. this c. that d. thing 47.I ... You had bette r________ at home. a. to stay b. have stayed c. was staying d. stay 54.Everything was ______ when I was interviewed. a. busy b. high c. slow d. smooth 55."Mary paid ... Mary visit me last Sunday. c. Mary paid me the money last Sunday. b. chosen c. chop d. pot 12. Pick out the word which has the underlined part pronounced differently from the rest a. tolerated...

Ngày tải lên: 21/06/2013, 01:25

... have to do housework with their hands d. No longer have women to do housework with their hands 12. I would rather be a teacher _________ __ a manager. a. than b. more than c. better d. better ... The contestants ________ from 18 to 25. a. put b. arrange c. order d. range 9. How much is this sewing _________? a. machine b. machiner c. machinist d. machinery 10.The teacher emphasized ... started school at the age _________six. a. in / at b. into / of c. on / at d. on / of 30.At this first _______ it is impossible for us to know whether we will succeed or not. a. stair b....

Ngày tải lên: 21/06/2013, 01:25

... farm ___________ for meals when we spend our weekends on our uncle's farm. a. articles b. things c. goods d. products 25.Pick out the word which has the underlined part pronounced differently ... drought. a. out b. about c. from d. off 34.That beautiful girl _______ so much money to buy things thatshe did not really need. a. wasted b. used carefully c. economized d. exchanged 35.Peter ... approve your application. a. inform b. to inform c. informed d. informing 38.The ________ development leads to our country's prosperity. a. industry b. industries c. industrial d. industrialize...

Ngày tải lên: 21/06/2013, 01:25

... b. page c. garbage d. luggage 12 What can we do to reduce air pollution?- I have no ________ idea a. a b. an c. the d. no ... completely. d. Pollution can be eliminated completely. 27.There are many people who do not know anything about protecting the environment." means __________. a. They are unaware of protecting...

Ngày tải lên: 21/06/2013, 01:25

... interesting. a. The most important thing is playing football. lưu file văn bản Xem đáp án Trang trước d. off 34.That beautiful girl _______ so much money to buy things thatshe did not really need. ... farm ___________ for meals when we spend our weekends on our uncle's farm. a. articles b. things c. goods d. products 25.Pick out the word which has the underlined part pronounced differently ... differently from the rest a. plough b. laugh c. cough d. rough 50.She is late again. There is nothing to do but _______ a. to wait b. wait c. waited d. waiting 51.Pick out the word which...

Ngày tải lên: 21/06/2013, 01:25

... out the word which has the underlined part pronounced differently from the rest a. this b. thing c. clothing d. together 49.I usually feel _________ when I stay at home _______. a. alone ... underlined part pronounced differently from the rest a. section b. can c. clean d. associate 6. In this library, there is a _________ for books on science and technology. a. special section b. ... a. You are welcome b. Good bye. See you soon. c. Not at all d. Hello 47.I could not say anything to express my feeling, except a ________ of sympathy when I heard the bad news from him....

Ngày tải lên: 21/06/2013, 01:25

... scar will be formed. a. complexion b. beams c. tissues d. issues b. device c. vice d. way 12. The sun light __________ sea water and we get salt. a. raises b. rises c. shines d. vaporises ... the future c. We preserve natural resources for future use d. a and c 10._________ on barren slopes can prevent erosion. a. To plant trees b. Planting trees c. In order to plant trees d....

Ngày tải lên: 21/06/2013, 01:25

... 1/256 + 1/ 512 bằng… Bài giải: Vậy dãy số đó là: 1/2 + 1/4 + 1/8 + 1/32 + 1/64 + 1 /128 + 1/256 + 1/ 512 = 256/ 512 + 128 / 512 + 64/ 512 + 32/ 512 + 16/ 512 + 8/ 512 + 4/ 512 + 2/ 512 + 1/ 512 = 511/ 512 Đáp ... 1 /12 ) => 40 ( x + 1/5 ) = 50 ( x – 1 /12 ) => 40x + 40/6 = 50x – 50 /12 => 10x = 40 /6 + 50 /12 x = ( 130 /12) : 10 = 13 /12 Vậy độ dài quãng đường AB là: 40 ( 13 /12 + 1/6 ) = 40 x 15 /12 ... giờ , cả 2 vòi chảy được: bể Bài 122 : Tìm một số tự nhiên có ba chữ số biết nếu lấy số đó nhân với tổng các chữ số của nó thì được 1000. Số đó là : 125 Bài 123 :Hãy cho biết có tất cả bao nhiêu...

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