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de luyen thi toeic co dap an chi tiet so 2

Khảo sát sự biến thiên và vẽ đồ thị hàm số - Luyện thi ĐH (Có đáp án chi tiết)

Khảo sát sự biến thiên và vẽ đồ thị hàm số - Luyện thi ĐH (Có đáp án chi tiết)

Toán học

... − cos 2x f) Ta có: y = + sin 2x + + cos 2x = sin 2x + cos 2x + ⇔ sin 2x + cos 2x = 2y − 2 √ √ Phương trình nghiệm ⇔ 22 + 12 ≥ (2y − 3 )2 ⇔ 4y − 12y + ≤ ⇔ 3 2 ≤ y ≤ 3 +2 √ √ Vậy max y = 3 +2 ... [2; +∞) 3m(x2 − 2x + 3) + 6x − 18 ≥ 0, ∀x ∈ [2; +∞) ⇔ m ≥ Xét hàm số f (x) = x2 − 2x , ∀x ∈ [2; +∞) − 2x + (3) √ − 2x 2x2 − 12x + [2; +∞) f (x) = ; f (x) = ⇔ x = ± x2 − 2x + (x − 2x + 3 )2 ... Xét hàm số f (x) = x2 + 2x − , ∀x ∈ (0; 3) (2) 2x + x2 + 2x − 2x2 + 2x + [0; 3] f (x) = > 0, ∀x ∈ [0; 3] Bảng biến thi n: 2x + (2x + 1 )2 x + f (x) 12 f (x) −3 Từ bảng biến thi n ta max f...
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Phương trình - Hệ phương trình - Bất phương trình - Luyên thi ĐH (Có đáp án chi tiết)

Phương trình - Hệ phương trình - Bất phương trình - Luyên thi ĐH (Có đáp án chi tiết)

Toán học

... = [1; 2] Với t < Bài tập 2. 24 Giải phương trình sau √ a) x2 − =√ x2 − 2x 2x c) (4x − 1) x3 + = 2x3 + 2x + √ b) x2 − = 2x x2 +√ 2x d) x2 + 4x = (x + 2) x2 − 2x + 24 Lời giải √ a) Đặt x2 − 2x = ... x3 + 2x2 = (*) Ta ∆ = 9x2 − −x4 − x3 + 2x2 = 4x4 + 4x3 + x2 = 2x2 + x Do (∗) ⇔ m= m= 3x+2x2 +x 3x−2x2 −x ⇔ m = x2 + 2x ⇔ m = x − x2 x2 + 2x − m = (1) x2 − x + m = (2) ∆1 = + 4m ≥ ⇔ 2 = − ... {2} c) Bất phương trình tương đương với (x − 2) x2 + < (x − 2) (x + 2) ⇔ (x − 2) x2 + − x − <   x x >2 √− >   x2 + < x2 + 4x + x2 + < x + x >2 ⇔ ⇔ ⇔   x 2
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Nguyên hàm - Tích Phân - Luyện thi ĐH (Có đáp án chi tiết)

Nguyên hàm - Tích Phân - Luyện thi ĐH (Có đáp án chi tiết)

Toán học

... tan4 x dx = 2cos2 x − 0 π (tan x + 1) tan4 x dx = cos2 x − cos2 x −tan2 x − + 1 − tan x + + tan x (1 − tan x)(1 + tan x) −tan2 x − + = 2 d (tan x + 1) = − π tan x + π = tan4 x d (tan x) − tan2 ... = cos 2xdx π π I1 = e2x sin 2x Lại đặt π − π e 2x e2x sin 2xdx sin 2xdx = − 0 du = 2e2x dx u = e2x ⇒ Ta dv = sin 2xdx v = − cos 2x   π π 2x e2π − e2π − I1 = −  − e cos 2x + e2x cos 2xdx ... = cos x g) I = = π h) I = 1 + ln 3 cos x − d (cos x) = cos x cos x d (cos x) = ln − π 1 − cos6 x cos4 x π 1 dx − cos4 x cos2 x dx = 0 1 dx cos2 x cos2 x π + tan2 x d (tan x) − + tan2 x d (tan...
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de luyen thi Dh co dap an- hay

de luyen thi Dh co dap an- hay

Vật lý

... th hiu dng gia hai u cun th cp l: A.I2 = 2A; U2 = 120 V B I2 = 2A; U2 = 360V C I2 = 18A; U2 = 40V D I2 = 18A; U2 = 360V Cõu 28 Khi t in mch dao ng LC bin thi n theo biu thc q = Q0 sin t Biu thc ... ? C.u q.u q Q 02 L.i Q 02 A.Nng lng in : W = B Nng lng t : Wt = = = = sin t = cos 2t 2 2C 2C 2C 2 2 L.I0 L. Q0 Q0 Q2 C.Nng lng dao ng : W= D.Nng lng dao ng: W = Wd + Wt = = = 2C 2C 4C F v cun dõy ... liu N =20 0 vũng, S = 125 cm2 , B = 0,4T, = rad s , = 100 , vo lỳc t = S 50 A f = 100Hz, E = 444 (V) C f = 50 Hz , E = 444 (V) B f = 50 Hz , E = 22 2 (V) D f = 100Hz, E = 444 (V) Cõu 21 Dũng...
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870 CÂU HỎI LUYỆN THI TOEIC CÓ ĐÁP ÁN

870 CÂU HỎI LUYỆN THI TOEIC ĐÁP ÁN

TOEFL - IELTS - TOEIC

... na fo 22 2.(B) 22 3.(C) 22 4.(D) 22 5.(C) 22 6.(D) 22 7.(A) 22 8.(D) 22 9.(B) 23 0.(B) 23 1.(B) 23 2.(C) 23 3 Farmers grow popcorn in much the same way field corn, except that the rows are planted together ... larutluc ro laicos sti No custom, belief, or action can be A B D context doot srednu ylluf 4 52 )D(.3 52 )A( .25 2 )D(.1 52 ) (.0 52 ) (.9 42 ) (.8 42 ) A(.7 42 )B(.6 42 )D(.5 42 )A(.4 42 )D(.3 42 )C( .24 2 D cisum ... other of the 26 6 All objects are composed D him deppot s saw eH 5 62 )C(.4 62 )D(.3 62 )A( .26 2 )D(.1 62 )A(.0 62 ) B(.9 52 )D(.8 52 )D(.7 52 )D(.6 52 )C(.5 52 )D(.4 52 D sweJ ezimitciv ot dengi sed B yned...
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Đề TOEIC có đáp án chi tiết đề 1

Đề TOEIC đáp án chi tiết đề 1

TOEFL - IELTS - TOEIC

... at Grand Canyon souvenir shop Adults 18-64 $ 120 Adults 65+ $100 Teens 13-17 $80 Children 5- 12 $60 Package Includes everything from Package 1, PLUS * 25 % discount at Grand Canyon View Restaurant ... very comfortable using this software Again, thank you for your time and consideration I hope to hear from you soon concerning your hiring decision Yours truly, Anusak Arinchai Photocopiable 25 ... state and regional industry associations and economic development groups to teach companies "lean" manufacturing techniques This not-for-profit organization, administered by the Department of Commerce,...
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Đề TOEIC có đáp án chi tiết đề 2

Đề TOEIC đáp án chi tiết đề 2

TOEFL - IELTS - TOEIC

... (18) A (19) A (20 ) B (21 ) C (22 ) B (23 ) A (24 ) C (25 ) B (26 ) C (27 ) B (28 ) B (29 ) A (30) C (31) B ( 32) A (33) B (34) C (35) A (36) B (37) B (38) A (39) C (40) B Photocopiable (41) ( 42) (43) (44) ... (109) D (110) C (111) B (1 12) A (113) A (114) C (115) D (116) C (117) B (118) A (119) D ( 120 ) B ( 121 ) ( 122 ) ( 123 ) ( 124 ) ( 125 ) ( 126 ) ( 127 ) ( 128 ) ( 129 ) (130) (131) (1 32) (133) (134) (135) (136) ... introductory work It is dense The arguments can sometimes seem abstruse and arcane And the narrative is so wide in scope that one should really have taken an introductory course in the region just...
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Đề TOEIC có đáp án chi tiết đề 3

Đề TOEIC đáp án chi tiết đề 3

TOEFL - IELTS - TOEIC

... member, Sheila Anderson's husband is ill and in the hospital MOTION to send a gift to Anderson's husband, expressing the organization's sympathy and support; seconded and passed Finance Committee ... high-density polyethylene, not biodegrade and persist on the planet up to 1,000 years, according to Chicago-based ReusableBags.com More than 20 0 Taco Loco restaurants use EarthFirst's products, and ... Toussant (who ought to get behind the camera more often), gets a lot of mileage out of the confident and wistful performances of Susan Evans and Sean Robinson as Jan and Dave, a married couple...
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Đề TOEIC có đáp án chi tiết đề 4

Đề TOEIC đáp án chi tiết đề 4

TOEFL - IELTS - TOEIC

... (1) B (2) A (3) C (4) D (5) B (6) B (7) A (8) A (9) A (10) D (11) A ( 12) C (13) A (14) B (15) C (16) A (17) B (18) A (19) B (20 ) C (21 ) A (22 ) B (23 ) A (24 ) B (25 ) A (26 ) C (27 ) C (28 ) A (29 ) B ... (119) B ( 120 ) D ( 121 ) C ( 122 ) C ( 123 ) D ( 124 ) B ( 125 ) A ( 126 ) B ( 127 ) C ( 128 ) C ( 129 ) A (130) B (131) A (1 32) D (133) D (134) C (135) B (136) A (137) C (138) B (139) D (140) C (141) B (1 42) C (143) ... sessions Hayride Lunch Cost: $7 for each adult and $4 for each child under the age of 10 Please make your reservations by January 18 You can send an email to Janine in Human Resources (This event...
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Đề TOEIC có đáp án chi tiết đề 5

Đề TOEIC đáp án chi tiết đề 5

TOEFL - IELTS - TOEIC

... **** RATES OF FARES (Effective 02/ 02/ 2010) Per trip Person of 12 years or more - $2 Person under 12 years - $1 Person under years and accompanied by a person of 12 years or more - $0 Monthly ticket ... (18) B (19) C (20 ) C (21 ) A (22 ) B (23 ) A (24 ) B (25 ) A (26 ) C (27 ) B (28 ) C (29 ) B (30) B (31) C ( 32) A (33) A (34) A (35) C (36) B (37) C (38) A (39) B (40) C Photocopiable (41) ( 42) (43) (44) ... printing company (A) at (B) by (C) in (D) on Question (144) Letter Dear Health and Dental Plan Member, This reminder is concerning your AARP-approved Dental Plan with United Discount Dental When...
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Đề TOEIC có đáp án chi tiết đề 7

Đề TOEIC đáp án chi tiết đề 7

TOEFL - IELTS - TOEIC

... One who can speak Japanese, Korean, and Chinese 'B) One who can speak Korean, Engiish, and German (C) One who is very good at dealing with computers (D) Freshman 23 How will the applicants know ... sheet 22 Mark your ansvver on your ansvver sheet 37 Mark your ansvver on your ansvver sheet 23 Mark your answer on your ansvver sheet 38 Mark your answer on your answer sheet 24 Mark your ansvver ... your answer on your answer sheet 20 Mark your answer on your ansvver sheet 35 Mark your ansvver on your ansvver sheet 21 Mark your answer on your answer sheet 36 Mark your answer on your answer...
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  • 474
Đề TOEIC có đáp án chi tiết đề 8

Đề TOEIC đáp án chi tiết đề 8

TOEFL - IELTS - TOEIC

... ,  +      $     ,    ,  /   , 0    $    ,     $  124 ;=  + >   !    *    !+  357 :                    ...
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Đề TOEIC có đáp án chi tiết đề 9

Đề TOEIC đáp án chi tiết đề 9

TOEFL - IELTS - TOEIC

... type of company does the speaker W ric I for? (A) A heavy machinery manufacturer (B) An accounting company (C) A shipping company (D) An automobile dealer 99 What is suggested about the company? ... sheet 22 Mark your ansvver on your answer sheet 37 Mark your ansvver on your answer sheet 23 Mark your answer on your ansvver sheet 38 Mark your ansvver on your ansvver sheet 24 Mark your answer ... Explore Asian masterpieces, traditional arts, an extensive colledion of European art, an old Aírican art collection one of the most comprehensive Japanese art collections outside of Japan, and the...
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