c a2 b2 c2 d2 e2 a b c d e

... vậy: A< /b> p dụng b ́t đẳng thư c < /b> Côsi ta có: a2< /b> < /b> b +c < /b> a2< /b> < /b> b + c < /b> + ≥ =a < /b> b +c < /b> b +c < /b> b2 < /b> c+< /b> a < /b> b2 < /b> c < /b> + a < /b> + ≥2 =b c+< /b> a < /b> c+< /b> a < /b> c2 /b> a+< /b> b c2 /b> a < /b> + b + ≥2 =c < /b> a+< /b> b a+< /b> b a2< /b> < /b> b2 < /b> c2 /b> a+< /b> b +c < /b> Suy ra: + + + a+< /b> b +c < /b> b +c < /b> c +a < /b> a +b a2< /b> < /b> b2 < /b> ... bc + ca = 1) ⇔ − bc − ac − ab (a < /b> + b) (a < /b> + c)< /b> (b + a)< /b> (b + c)< /b> (c < /b> + a)< /b> (c < /b> + b) + + ≥ + + bc ac ab a2< /b> < /b> b2 < /b> c2 /b> ⇔ ab + ca bc + ab ac + bc (a < /b> + b) (a < /b> + c)< /b> (b + a)< /b> (b + c)< /b> (c < /b> + a)< /b> (c < /b> + b) + + ≥ + + 2 bc ac ... +1 abc a < /b> b2 < /b> c2 /b> 1 1+ a2< /b> < /b> + b2 < /b> + c2 /b> ⇔ + + −3≥ + + bc ac ab a2< /b> < /b> b2 < /b> c2 /b> ab + bc + ca + a < /b> ab + bc + ca + b   1    ⇔  − 1÷ +  − ÷+  − ÷ ≥ + a2< /b> < /b> b2 < /b>  bc   ac   ab  ab + bc + ca + c < /b> + c2 /b> ( ab...

Ngày tải lên: 26/07/2016, 14:55

Ngày tải lên: 21/10/2016, 10:54

... ABC A < /b> ' B ' C < /b> ' 1,00 Gi M, N ln lt l trung im ca AB v A'< /b> B' Tam gi c < /b> CAB c< /b> n ti C < /b> suy AB CM Mt kh c < /b> AB 0,25 CC ' AB (CMNC ') A < /b> ' B ' (CMNC ') K MH CN ( H CN ) MH (CMNC ') MH A < /b> ' B ... (CA ' B ') mp (CA ' B ') cha CB ' v song song vi AB nờn a < /b> 0,25 d ( AB, CB ') = d ( AB, (CA ' B ')) = d ( M , (CA ' B ')) = MH = a < /b> Tam gi c < /b> vuụng BMC CM = BM tan 30 = 0,25 Tam gi c < /b> vuụng 1 CMN ... - IB = IC => khong c< /b> ch t B ti mp ( ) bng ln khong c< /b> ch t C < /b> ti ( ) a < /b> + b + 2c < /b> + d a < /b> + 2b 2c < /b> + d 3a < /b> 3b + 6c < /b> d = => =2 (3) a < /b> + 5b 2c < /b> + 3d = a < /b> + b2 < /b> + c2 /b> a2< /b> < /b> + b2 < /b> + c2 /b> T (1), (2), (3) ta c< /b> ...

Ngày tải lên: 20/02/2014, 06:20

... a < /b> b 2c < /b> d a < /b> 2b 2c < /b> d 3a < /b> 3b 6c < /b> d a < /b> 5b 2c < /b> 3d a < /b> b2 < /b> c < /b> a2< /b> < /b> b2 < /b> c2 /b> T (1), (2), (3) ta c< /b> trng hp sau : b a < /b> a b c < /b> d c < /b> a < /b> chn TH1 : a < /b> 2b 2c < /b> 3a < /b> 3b 6c < /b> d d a < /b> a < /b> b ... ỏp dng (*) ta c< /b> 1 P 3 3 a < /b> 3b b 3c < /b> c 3a < /b> a 3b b 3c < /b> c < /b> 3a < /b> ỏp dng Bt ng thc C< /b> si cho ba s dng ta c< /b> a < /b> 3b 1 a < /b> 3b 3 b 3c < /b> 1 b 3c1< /b> .1 b 3c < /b> 3 c < /b> 3a < /b> 1 c < /b> 3a1< /b> .1 c < /b> 3a < /b> 3 a < /b> ... gi c < /b> CAB c< /b> n ti C < /b> suy AB CM Mt kh c < /b> AB CC ' AB (CMNC ') A < /b> ' B ' (CMNC ') K 0,25 1 MH CN ( H CN ) MH (CMNC ') MH A < /b> ' B ' MH (CA ' B ') mp (CA ' B ') cha CB ' v song song vi AB nờn d...

Ngày tải lên: 09/03/2014, 05:20

... kh c < /b> AB CC ' AB (CMNC ') A < /b> ' B ' (CMNC ') K 0,25 MH CN ( H CN ) MH (CMNC ') MH A < /b> ' B ' MH (CA ' B ') mp (CA ' B ') cha CB ' v song song vi AB nờn d ( AB, CB ') d ( AB, (CA ' B ')) ... vuụng g c < /b> a < /b> 2b 2c < /b> (2) - 0,25 IB IC khong c< /b> ch t B ti mp ( ) bng ln khong c< /b> ch t C < /b> ti ( ) a < /b> b 2c < /b> d a < /b> 2b 2c < /b> d 3a < /b> 3b 6c < /b> d a < /b> 5b 2c < /b> 3d a < /b> b2 < /b> c < /b> a2< /b> < /b> b2 < /b> c2 /b> T (1), (2), (3) ta c< /b> ... 3c < /b> c < /b> 3a < /b> ỏp dng Bt ng thc C< /b> si cho ba s dng ta c< /b> 1,00 0,25 0,25 a < /b> 3b 1 a < /b> 3b 3 b 3c < /b> 1 b 3c1< /b> .1 b 3c < /b> 3 c < /b> 3a < /b> 1 c < /b> 3a1< /b> .1 c < /b> 3a < /b> 3 a < /b> 3b1 .1 1 a < /b> 3b b 3c < /b> c < /b> 3a < /b> a < /b> b...

Ngày tải lên: 18/03/2014, 10:22

... a < /b> b 2c < /b> d a < /b> 2b 2c < /b> d 3a < /b> 3b 6c < /b> d a < /b> 5b 2c < /b> 3d a < /b> b2 < /b> c < /b> a2< /b> < /b> b2 < /b> c2 /b> T (1), (2), (3) ta c< /b> trng hp sau : b a < /b> a b c < /b> d c < /b> a < /b> chn TH1 : a < /b> 2b 2c < /b> 3a < /b> 3b 6c < /b> d d a < /b> a < /b> b ... ỏp dng (*) ta c< /b> 1 P 3 3 a < /b> 3b b 3c < /b> c 3a < /b> a 3b b 3c < /b> c < /b> 3a < /b> ỏp dng Bt ng thc C< /b> si cho ba s dng ta c< /b> a < /b> 3b 1 a < /b> 3b 3 b 3c < /b> 1 b 3c1< /b> .1 b 3c < /b> 3 c < /b> 3a < /b> 1 c < /b> 3a1< /b> .1 c < /b> 3a < /b> 3 a < /b> ... gi c < /b> CAB c< /b> n ti C < /b> suy AB CM Mt kh c < /b> AB CC ' AB (CMNC ') A < /b> ' B ' (CMNC ') K 0,25 1 MH CN ( H CN ) MH (CMNC ') MH A < /b> ' B ' MH (CA ' B ') mp (CA ' B ') cha CB ' v song song vi AB nờn d...

Ngày tải lên: 24/03/2014, 00:20

... 2)-spheres There are many copies of the Boolean lattice 2 [d] (or equivalently, the face lattice of the (d − 1)-simplex) embedded in every geometric lattice of length d Each such Boolean subposet determines ... intersection lattice of a < /b> real a< /b> ne hyperplane arrangement Central hyperplane arrangements Let A < /b> be an essential arrangement of linear hyperplanes in Rd As before, let LA denote the set of intersections ... the geometric method is applied to the intersection lattice of any Coxeter arrangement, the cycles in the resulting basis are Boolean and are indexed by the elements of the Coxeter group that correspond...

Ngày tải lên: 07/08/2014, 08:22

... d ng (A < /b> B) 2 = (C < /b> D) 2 A < /b> B = C < /b> D A < /b> B = (C < /b> D ) D ng 3: Phơng trình quy d ng (A < /b> B )2 + (C < /b> D )2 + (E F)2 = A < /b> B = C < /b> D = E F = D ng Nghiệm nguyên quy d ng (A < /b> B) 2 p với A,< /b> B số nguyên ... d ng HĐT (A < /b> B) 2 =A2< /b> < /b> 2AB +B2 < /b> Mỗi d ng toán nh c< /b> hai ví d minh hoạ C< /b> ví d a < /b> vài c< /b> ch giải kh c < /b> để b n đ c < /b> tiện so sánh tìm hớng thích hợp trình giải tuơng tự Để triển khai sáng kiến c< /b> ch c< /b> ... hc sinh t im thp ch c< /b> n ớt, em ( 18,6%) c< /b> im di trung b nh - Bng thng kờ chi tit so sỏnh im kim tra hc kỡ I ca nm hc: 20082009 v hc kỡ I nm hc: 2009-2010 ca lp trng PTCS Nam Thng Bng Loi C< /b> ch...

Ngày tải lên: 02/08/2015, 16:03

Ngày tải lên: 15/08/2012, 11:00

Ngày tải lên: 15/08/2012, 11:01

Ngày tải lên: 15/08/2012, 11:01

... (www.hp-vietnam.com) All right reserved Trang web www.hp-vietnam.com c< /b> nhiều tài liệu tiếng Anh, trình độ A,< /b> B, C,< /b> IELTS TOEFL Copyright 2005 by Hp Group (www.hp-vietnam.com) All right reserved Trang ... (www.hp-vietnam.com) All right reserved Trang web www.hp-vietnam.com c< /b> nhiều tài liệu tiếng Anh, trình độ A,< /b> B, C,< /b> IELTS TOEFL Copyright 2005 by Hp Group (www.hp-vietnam.com) All right reserved Trang ... tiếng Anh, trình độ A,< /b> B, C,< /b> IELTS TOEFL Copyright 2005 by Hp Group (www.hp-vietnam.com) All right reserved Trang web www.hp-vietnam.com c< /b> nhiều tài liệu tiếng Anh, trình độ A,< /b> B, C,< /b> IELTS TOEFL...

Ngày tải lên: 29/05/2013, 23:20

... When the electricity failed, he a < /b> match to find the candles a < /b> rubbed b scratched c < /b> struck d started > c < /b> 169 He filled in the necessary forms and for the job a < /b> appealed b asked c < /b> requested ... enters d zone > b 59 When he arrived at the furniture shop, they had been sold the table he wanted a < /b> at b furniture c < /b> had been sold d wanted > c < /b> 60 May Day regularly is celebrated in many countries ... we are learning now is very interested but difficult a < /b> that b now c < /b> interested d but > c < /b> 41 She made me to pay for the damage I had done a < /b> made b to pay c < /b> for d had done > b 42 He warned me...

Ngày tải lên: 03/06/2013, 01:26

... không hợp lệ file b x a < /b> (violet.vn/uploads/resources/184/184527//%20.ATHIHSGTNHMNVTL12.doc) Quay trở http://violet.vn ...

Ngày tải lên: 05/06/2013, 01:26

... "libro".) Jaa, are wa This sentence means "Then, how about that over there?" The sentence should be Jaa, are wa nan desu ka Again, since nan desu ka is already mentioned and understood, it can be ... main types of adjectives in Japanese: i-adjectives (i .e adjectives that end in い) and na-adjectives (adjectives that end in な With i-adjectives in the present tense, the i always remains attached ... alphabet, or syllabary (a < /b> set of characters, where each character represents a < /b> syllable) used to represent particles in sentences, verb inflexions (this usage is called okurigana), and other words...

Ngày tải lên: 06/07/2013, 09:45

... unemployed as today) Hardly had he fallen asleep when he began to dream of far-way lands (He had hardly fallen asleep when he began to dream of far-way lands.) Rarely have we seen such an effective actor ... the admissions committee denied Henry admission to graduate school because they did not believe that he could handle the work load Henry was denied admission to graduate school because the members ... among) What are the differences between crows, rooks, and jackdaws Between each + noun (-and the next) (more formal) We need meters between each window There seems to be less and less time between...

Ngày tải lên: 16/07/2013, 01:25

... lm vic C < /b> quan thc hin th tc hnh chớnh - C < /b> quan thc hin: B Giỏo dc v o to - C < /b> quan hoc ngi c< /b> thm quyn c < /b> u quyn hoc phõn cp thc hin (nu c< /b> ): Cc C < /b> s vt cht v Thit b trng hc, chi tr em - C < /b> quan ... 2368/Q-BGDT v vic trin khai ỏp dng thớ im c < /b> ch mt ca ti C < /b> quan B Giỏo dc v o to - Thụng t s 03/2009/TT-BXD ngy 26/3/2009 ca B Xõy dng v vic Quy nh chi tit mt s ni dung ca Ngh nh s 12/2009/N-CP ngy ... vi c< /b> c < /b> ni dung chớnh sau: Tờn d ỏn: Ch u t: T chc t lp d ỏn: T chc t lp thit k c < /b> s (nếu kh c < /b> với tổ ch c < /b> t vấn lập d án): Ch nhim lp d ỏn: Mc tiờu u t xõy dng: Ni dung v quy mụ u t xõy dng: a...

Ngày tải lên: 09/08/2013, 11:23

... Indians because when Columbus landed in the Bahamas in 1492, he thought that he …………… the east Indies a < /b> has reached b has been reached c < /b> had been reached d had reached d 51 Most school-leavers have ... the time, Christopher Columbus had reached the East Indies a < /b> believe b belief c < /b> believed d believer b 184 …………… missile was used in the war between American and Irak a < /b> Guidance b Guide c < /b> Guided ... Guided d Guideless c < /b> 185 A < /b> barometer is a < /b> device with a < /b> sealed metal chamber designed ……………… the changes in the pressure of air in the atmosphere a < /b> to reading b read c < /b> reading d to read d 186 Cotton...

Ngày tải lên: 14/08/2013, 23:26

... Find out your number no yes a < /b> B C < /b> D cat cap dog doll apple ant book bag cat cap dog doll auto ...

Ngày tải lên: 19/08/2013, 01:10