Blok 4:
Vaardigheden.
1. a. domein: x0 en bereik: ¡ b. 2 1 2 logx3 1 2 3 2 8 2 x c. Voor 0 x 8 2 is 2 1 2 logx3 d. 2logx 1 1 1 2 1 2 2 x x e. 2log1 0 en 2log 2 1 f. 7log1 0 en 7log 7 1 2. a. domein: ¡ en bereik: y0 b. 1. 2x 32 2 5 2. 5 5 1 1 32 2 2x 2 3. 2x5 5 x x 5 x 2log 5 4. 1 1 2 22 2 2x 4 2 2 2 2 5. 2x13 6. 2x 103 1 2 2 x x 2log13 x 2log103 3. a. 3log(2x 1) 4 b. 12log(2x) 10 c. 3 2 log( x24) 5 4 2 1 3 81 2 82 41 x x x 10 1 1 2 1024 1023 1024 2 ( ) 1 2,00 x x 2 2 2 1 2 log( 4) 2 log( 4) 1 4 10 10 x x x 2 14 14 14 3,74 x x x d. 21 2 x 8 23 e. 33x 30 f. 43x 12 1 2 3 2 2 1 x x x 3 3 1 3 3 log 30 log 30 1,03 x x 4 4 1 3 3 log12 log12 0,60 x x 4. a. 1. q8logp 2. q1,3logp 3. q3p 4. q10pb. 1. 5log 75log85log 7 8 5log 56
2. 4 log 26 6log 5 6log 246log 5 6log16 5 6log 80
5. a. plog(q2) b. 1 4 2 log(3 ) p q c. p0,5 log(35 q1) 2 10 10 2 p p q q 12 1 2 4 1 2 log(3 ) 3 4 4 3 p p q p q q 5 2 2 1 1 3 3 2 log(3 1) 3 1 5 5 p p p q q q d. p 9 3 2q e. p5 5q 3q13 f. p0, 2 log( q0,3) 1 3 2 1 3 3 2 9 2 3 log(3 ) q q p p q p 4 1 5 5 1 1 4 4 5 3 4 1 log( 3) log( 3) q p q p q p 5 5 5 log( 0,3) 0,3 10 10 0,3 p p p q q q 6.
a./b. 3 log P 8 logT 2
3 8 3 8
3 8
log log log log100
100 P T P T P T 7.
a. 2logP2logT 3 b. 4logH4logK 1 c. 6logx3 4 log6 y2 2log 2log 23 8 P T P T 4 4 1 1 4 logH K log 4 H K 6 3 6 4 6 2 3 4
log log log 6 36 x y x y d. 4 4 2 log(2 ) 2 5 log a b e. 3
log(12 ) log(6 ) 2 logq q p
4 2 4 5 4 2
2 5
log(2 ) log log 4
4 16 a b a b 3 2 12 2 6 2 2 log( ) logq q q p p f. 4 log(3 ) 3 log(5 R 5 Q 1) 2 5 4 5 3 5 4 5 3 5 2 4 3 log(3 ) log( 1) 2 log81 log( 1) log 5 81 ( 1) 25 R Q R Q R Q 8. a. 3 x 0 en x 1 0 3 3 x x 1 x
b. Dan moet je de gemeenschappelijke waarden nemen van de verzamelingen uit a. c. h x( ) log(3 x) 2 log(x 1) log(3 x) log(x1)2log(3x x)( 1 )2
9.
a. h x( ) 4 log 5 x5log(x 3) 5logx45log(x 3) 5log (x x4 3) 5log(x53 )x4 b. h x( ) 3 log 2 x 2 log(2 x4) 2logx32log(x4)2 2log (x x3 28x16)
2log(x58x416 )x3
c. 7log 3x7log12x 7log 36x2 7log(6 )x 2 2 log 67 x
10.
a. 3log 5x3log(2x4)3log 5 (2x x4)3log(10x220 )x b. log(x 5) log(3x 1) log(x5)(3x 1) log(3x214x5)
c. 4log(x 3) 2 log(84 x) 4log(x3)(8x)2 4log(x3)(x216x64) 4log(x3 19x2 112x 192)
d. 2 2 log( 3 x 1) 3log 323log(x1)2 3log 9(x2 2x 1) 3log(9x218x9)
11.
a. 2
log
y x is stijgend, dus f(x) is stijgend.
b. 2
log( )
y x is dalend, dus m(x) is dalend.
c. 2
log
y x is dalend, dus g(x) is dalend.
d. 2
1 log
y
x
is dalend, dus h(x) is dalend.
12. a. 5p23p0 3 5 (5 3) 0 0 p p p p b. Omdat (2 )x 2 22x
c. 2x 0 heeft geen oplossing.
d. 3 5 2x 2 3 5 log x 13. a. 32x 5 3x 6 (3 )x 2 5 3x 6 p25p6 b. p25p 6 0 ( 2)( 3) 0 2 3 p p p p c. 3x 2 3x 3 3log 2 1 x x
14. a. 32x 4 3x 5 0 b. 42x4x12 0 c. 1 8 (2x2 2)(2x ) 0 2 4 5 0 ( 5)( 1) 0 5 1 p p p p p p 2 12 0 ( 3)( 4) 0 3 4 p p p p p p 1 2 1 8 1 1 3 8 1 2 2 2 2 0 2 0 2 2 2 2 2 2 1 3 x x x x x x 3 3 5 3 1 log 5 x x x 4 4 3 4 4 log 3 x x x d. 52x20 5 x 125 e. (4x1)(4x 1) 27 f. 2 (2x x 1) 32(2x1) 2 20 125 0 ( 5)( 25) 0 5 25 5 5 5 25 2 x x p p p p p p x 2 2 4 4 1 27 28 28 28 4 28 4 28 log 28 x x x p p p x 5 0 2 32 2 1 2 2 2 2 5 0 x x x x x x 15. a. p25p24 0 b. x2 8 x2 3 ( 8)( 3) 0 8 3 p p p p x 8 x 8 16. a. x418x232 0 b. 2 4 6q q 9 c. 2 2 (7v )(7v ) 0 2 18 32 0 ( 2)( 16) 0 2 16 p p p p p p 2 2 6 9 0 ( 3) 0 3 x x x x 2 2 2 2 7 0 7 0 7 7 7 7 v v v v v v 2 2 2 16 2 2 4 4 x x x x x x 2 3 3 3 q q q d. 2 2 4 (7 )(7 ) 32 49 32 h h h 1 4 4 81 81 3 3 h h h 17. a. 4x y 2 4 2 y x De richtingscoëfficiënt van l is 4. b. 4x 2 2x2 2 2 2 2x 4x 2 2(x 2x 1) 2(x1) 0
c. y4x b 5 4 2 8 3 4 3 b b b y x d. y'( 2) 4 2 8 18. a. dq 14p dp c. 2 (3 1)(3 1) 9 1 dq 18 q p p p p dp b. dq 5,3 dp d. 2 2 (4 ) 16 dq 32 q p p p dp 19. a. f x( ) (5 3 )(5 3 ) 25 9 x2 x2 x4 f x'( ) 36x3 b. g x( ) (3 x2)212x9x2 12x 4 12x9x24 g x'( ) 18 x c. h p( ) (5 ) p 4 54p4 625p4 h p'( ) 2500 p3 d. s t( ) (3 ) t2 3 (2 t3)(2t3) 27 t6 (4 t6) 28 t64 s t'( ) 168 t5 20. a. f x'( ) 2 x b. f x( ) (2 x4)216x c. f x( ) (3 x5)(3x 5) 9x225 '( 2) 4 ( 2) 9 4 9 4 2 1 4 1 f f y x b b b y x 2 4 16 '( ) 8 , '( 2) 16 ( 2) 32 32 16 2 32 0 16 x f x x f f b b b y x '( ) 18 '( 2) 36 ( 2) 11 11 36 2 72 61 36 61 f x x f en f b b b y x 21. a. f x'( )x2 b. f x'( ) 6 x c. f x( ) (2 x10)(2x10) 4 x2100 2 4 2 2 x x x 2 3 6x 4 x 1 2 '( ) 8 4 f x x x 22. a. f( 1) 8 P(-1, 8) b. f x'( ) 3 y3x b '( ) 6 '( 1) 6 8 6 1 6 2 f x x f b b b 1 2 3 1 2 4 6 3 ( , 5 ) x x R 3 1 1 4 2 2 1 4 1 4 5 3 1 4 3 4 b b b y x