Giaûi caùc baát phöông trình sau:... Giaûi caùc phöông trình sau:.[r]
(1)OÂN TAÄP PT – BPT MUÕ VAØ LOGARIT Giaûi caùc phöông trình sau: BÀI 22 x 1.4 x 1 8x a 5 d x 1 x 2 x 11 25 5 3 b 3x e x 38 x c (0,04) x 25 log3 x x 3 x x 500 f x1 x 3 x ) 4 x 1 14.7 x 2.7 x 48 7 x 2 k g 2(2 0,2 x 0,5 64 h l x 7,2 x 3,9 lg x 5 x lg(7 x ) 0 i 105lg x 1 lg x x m x lg x 100 1000 x Giaûi caùc phöông trình sau: BÀI a x 2 9.2 x 2 0 b x x x c 64.9 84.12 27.16 0 x2 e 36.3 x 3 d 0 f 1log3 x 31log3 x 210 0 4.2cos x 6 Giaûi caùc baát phöông trình sau: BÀI d x lg2 x 3lg x 1 x 2 g 1 k x 5 6lg x 2.3lg x log2 ( x 1) x 1 2 x 10 0 x 2 x 0 c x 3x 2 1 x x 3 f x 2 x 2 i 1 1 x 5 l 27 24 2.3lg(cot x )1 1 4x 2x 2 x e 1 h 0 12 0 2 x 1 b 1000 lg x 1 lg(tan x ) 2x x 3 x 4 x 1 x 2 x x 24 m 6 x 25 x 25 a 3 x x2 12.2 x 1 34 x 8 4.32 x 5 28 2 log2 k sin x l 64 x h x 1 3 x 2 6.3x 32( x 1) g i x x2 3 x 9 x 1 1 3 3 m 72 x 1 Giaûi caùc baát phöông trình sau: BÀI 2x x a 2.5 lg x 2 d x g x x 10 3lg x 5 b 25 2 2( x 2) 2( x 1) 8 e h 5 c 9.4 50 x 1 16 x log 4 x 52 x 1 1 35 3 f x x 1 5.6 x 4.9 1 21 2 x x 3 2 x 0 x x 2 3x i 0 (2) x x x k 9 BÀI Giaûi caùc phöông trình sau: log5 x ( x x 65) 2 a log3 (3 x 8) 2 x b d log3 (1 log3 (2 x 7)) 1 e log3 lg x h 1lg x 10 x g x k BÀI lg x 7 x 10 lg x lg2 x 0 log5 x a log x c log22 x log2 x 0 d e log x x log32 x 4 f 2 b m log2 (4 x 4) log2 x log2 (2 x1 3) log2 (25x 3 1) 2 log (5 x 3 1) x x m lg(6.5 25.20 ) x lg 25 d Giaûi caùc baát phöông trình sau: 3x x x 4 g k BÀI log1/2 ( x 1) e log7 2x 0 2x c log1/ (2 x ) log1/4 log2 ( x 1) 0 x h 0 log2 x 3 x l Giaûi caùc heä phöông trình sau: log2 x ( x 8 x 15) x 1 log3 x log3 x log1/3 log ( x 5) f log x log9 (3 x 9) i 1 m (0,5) log1/ x 5 x 3 4( x y )2 1 x y 125 a x y 128 3x 2y 1 b 2 x y 12 x y 5 c 3.2 x 2.3x 2,75 x 3y 0,75 d 7 x 16 y 0 x 49 y 0 e log f 5y x x y y 16 4 3.4 x y 12 g BÀI h Giaûi caùc heä phöông trình sau: x x log3 x x l log1/3 log3 log3 log1/2 x 3log1/2 x 2 k b lg x log x 1 2 log3 ( x 1) log3 (9 x 9) x log3 (28 2.3 x ) a lg2 x lg x log1/3 x log1/3 x 0 i log 0,5 ( x x 6) 5 x log2 (2 x ).log (16 x) log22 x h g lg (100 x ) lg (10 x ) lg x 6 BÀI log3 (1 x ) lg x i 5 3log x 0 log7 (2 x 1) log7 (2 x 7) 1 f log3 log9 x x 2 x l lg x 1 Giaûi caùc phöông trình sau: x c 32 x y 77 x y /2 3 7 1 x.2 y 972 ( x y ) 2 x y y x 1 x y 6 x y i (3) log4 x log2 y 0 2 a x 5y 0 log ( x y ) 2 log4 x log x y b x lg y 2 xy 20 c log2 x log2 y 3 x y 16 d 1 x y 15 log x log y 1 log 3 e 3log x y log5 y log y log x x f 2 lg( x y ) lg13 lg( x y ) lg( x y) 3lg g x y 8 x y log x log h xy 8 2 log x log y 5 y x i 2 log x 3y 15 y log2 x 2 log2 x 3y 1 k x y y x 32 log ( x y) 1 log3 ( x y) l y 3 log m x.2 y 576 ( y x ) 4 (4)