150 câu hỏi trắc nghiệm toán 12 ôn thi đại học có đáp án 2017

150 CU HI TRC NGHIM MễN TON 12 y= Cõu 1: Vi giỏ tr no ca tham s m thỡ hm s khong xỏc nh A m Cõu 2: Hm s A B m2 m y = x3 + 3x ( ;1) B mx xm m C nghch bin trờn tng D cú xỏc nh l: ( 0; ) Ă C Cõu 3: S im cc tr ca hm s A B D y = x3 x + ( 2; + ) l: C y = sin x cos x + m m D 2 Cõu 4: GTLN v NTNN A v ln lt l: B v y= Cõu 5: Vi giỏ tr no ca tham s m thỡ hm s xỏc nh A m1 B C v m C D v mx x + m D Cõu 6: Vi giỏ tr no ca tham s m thỡ hm s cc tiu m3 m3 A B C Cõu 7: Bng bin thiờn sau õy l ca hm s no? x y y - + y= A 2x + x2 y= B D cú cc i v m + m1 y = x + x + mx + m m3 ng bin trờn tng khong x 2x + y= C x +1 x2 y= D x+3 x+2 Cõu 8: Hm s A x4 +1 ( ;0 ) ng bin trờn khong B ( 1; + ) C Cõu 9: S im cc i ca hm s A B ( ; 1) y = x + 100 l: C D y = x 3x + Cõu 10: Cỏc khong ng bin ca hm s A ( 0;1) B D ( 3; ) [ 1;1] C l: Ă ( D ( ;0 ) ( 1; + ) ) y = x + x + m x 3m2 Cõu 11: Vi giỏ tr no ca tham s m thỡ hm s tr A m0 B m Ă C m0 y= Cõu 12: Tip tuyn ti im cc tiu ca hm s A Cú h s gúc dng C Song song vi trc honh 2 D cú cc m x x + 3x B Song song vi ng thng D Cú h s gúc bng -1 x =1 f ( x ) = x3 x x Cõu 13: Cho hm s Chn phỏt biu sai: A th ca hm s khụng cú ng tim cn B Hm s cú im cc i v mt im cc tiu Ă C Hm s xỏc nh trờn D Hm s cú im cc tr y= Cõu 14: Hm s A Ă \ { 3} 2x x+3 B ng bin trờn: Ă C ( ;3) y = x3 + x Cõu 15: Cho hm s Chn phỏt biu ỳng: A Hm s khụng cú cc tr B Hm s t cc i ti C Hm s t cc tiu ti D Hm s t cc i ti y= Cõu 16: Hm s x+2 x x =1 x = x =1 v t cc tiu ti xỏc nh trờn khong: x = D ( 3; + ) ( 1; + ) A B ( ;1) ( 1; + ) C Ă D y = x 3x 3 Cõu 17: Cỏc khong nghch bin ca hm s ( ;1) ( 1; + ) A B Cõu 18: GTLN v NTNN A v -13 B [ 1;1] y = x + x + v -13 y= Cõu 19: GTLN v NTNN A v -3 B C Ă \ { 0;1} trờn on trờn on C v y= x 1+ x Cõu 20: S ng tim cn ca th hm s A B C A ln lt l: D v -31 [ 0;3] ln lt l: D v -7 D Cõu 21: Vi giỏ tr no ca tham s m thỡ hm s Ă x ( m + 2) x2 + x ng bin : m m3 B m m C m1 Cõu 22: Vi giỏ tr no ca tham s m thỡ hm s D m1 B m Cõu 23: th sau õy l ca hm s no? C m 1 y = x + mx mx + 3 Ă A ( 0;1) l: y= trờn D [ 0; 2] v l: C v -12 x x 2x +1 ( ;1) m m D nghch bin trờn m1 m A y = x3 3x + B y = x3 + x + Cõu 24: Cỏc im cc tiu ca hm s A x = B C y = x3 x + y = x4 + 3x2 + x=5 C y = x x + 3x + D l: x = 1; x = x=0 D y = x + 3x + Cõu 25: Cho hm s Chn phỏt biu ỳng A th hm s ct trc honh ti im phõn bit B th hm s ct trc honh ti im phõn bit C th hm s khụng ct trc honh D th hm s ct trc honh ti im phõn bit Cõu 26: Trong cỏc khng nh sau khng nh no ỳng (3 ) (3 ) =3-6 A (3 ) =3-8 B Cõu 27: Rỳt gn biu thc A = (3 ) =3-6 C =3-2 D a a + a a a + a a A A = a B A= a+1 C A = Cõu 28: Tp xỏc nh ca hm s y = (x - x 6)-10 l D = ( ; 3) ( 2; + ) D = (3; 2) A D A = a +1 B D=R\{0} C R\{3;-2} D Cõu 29: Tp xỏc nh ca hm s y= x4 D = (0; +) A B D = R\{0} Cõu 30: Cho f(x) = 11 x x l A D D= R Tớnh f(1) 11 A B Cõu 31: Cho log35 = a Tớnh log2515 theo a 1+ a D = (; 0) C B a 1+ a C C 1+ a 2a D D 2a 1+ a Cõu 32:Cho cỏc s thc dng a , b , vi a ab = (1 + log a b) 3 log a A log a Khng nh no sau õy ỳng log a B ab = (1 + log a b) log ab = 6(1 + log a b) a C D Cõu 33: Chn khng nh sai cỏc khng nh sau: A lnx > x>e B log1/2x < ab = (1 + log a b) 0 a>0 D.log1/2 a = log1/2b Cõu 34:Trong cỏc kt qu sau kt qu no ỳng log = log A log = log 3 = log 3 B log C a = b> log 3 = D Cõu 35:Tỡm mnh ỳng cỏc mnh sau: A Hm s y = log1/2 x ng bin trờn R B Hm s y = log2x nghch bin trờn R C th hm s y = log2x luụn i qua im (1 ; 0) D th ca hai hm s y = log2x v y = log1/2x i xng qua trc tung Cõu 36:Hm s y = log|x2-1| cú xỏc nh l A D= R B D=(-;-1) (1; +) C D=(-1;1) D D=R\{-1;1} Cõu 37:Tớnh o hm ca hm s y = 17x A y = 17x B y = 17 x ln17 C y = 17xln17 D y = 17xlog17 Cõu 38: Tớnh o hm ca hm s y = log5x 5x ln x ln A y = C.y = 5xln5 Cõu 39: Tỡm Tp Xỏc nh ca hm s y = log A D = R x +1 2x C D =(-1;2) B y = D.y = 5xlog5 B D = R\{2} D.D = (;1) ( ; + ) log ( x + x x) Cõu 40: y = cú xỏc nhl: A (-; -2] B [1; +) C (-; -2] (2; +) Cõu 41: Nghim ca phng trỡnh log (x2-1) =log(x-3) l A x = B Vụ nghim C.x=1 D [-2; 2) D x = Cõu 42:Gii phng trỡnh log3(4 x 3) = A x = B x = 3x Cõu 43: Gii phng trỡnh A x = -1 ; x = x +3 C x= = 27 x B x =3 x x2 D x = C x = D x = ; x = =1 Cõu 44:Gii phng trỡnh A x=0 B x = ; x = log43 C x = ; x = -log43 D x = log34 Cõu 45: Cho P = 100 triu ng , r = 8% nm ,n= Tớnh s tin thu c c ln lói sau nm nh kỡ thỏng A 116,64 B 116,986 C 117,105 D 117,227 Cõu 46: Nghim ca bt phng trỡnh log0,1x < log0,12 l x > A B x< (0,1)2 C.x < Cõu 47:Tp nghim ca bpt log5( 4x ) > l < x < + A