438 Rozwiązania i odpowiedzi
DO ROZDZIAŁU VI
6.45. / = x2(l-6x + 13x2-12x3) .
6.46. / = 75xu-2x + i.
6.47. y' = 3axl--1 .
12
6.48. /=--
6.49. / = 63x*-15x'6 + 33x~12.
6.50. y'=7x4/3 —13x,/4 —-^-x-3,J .
6.51. x^o, y' = zn=f ■
5 VxJ
6.52. v'=-y7 .
6.53. x>0, y' = jy= — 3x2 +-jy=.
Vx2 27*
1 1 /-
6.54. x>0, y =—pr--57=-3n/x.
2 V* 2\/x2
lllx-
, 1
6.55. x>0, v' -- —t-t=z .
' 3^x5 3\/x2
-5 3
6.56. x>0, y^-yj^z-lte6-
6.57. <>0. x' = - Jp .
2 v
-7
6.58. x#0, y' = r-f=T9-
6.59. y'= 16x —3x2 .
-9
w
6.60. y' = 24x2+|N/x.
6.61. x#j, y'=
(3x —2)2
6.62. 2x2 —5x + l 5^0, / =
— 20x+25
(2x2 —5x + l)ł
6.63. 7x —x + 2#0, / =
, —3x(21xs+x-4)
(7xt-x+2)2
6.64. x +x-1^0. y' =
, 8x2(2x—3)
(x3+x— l)2
6.65. x#l, y' =
-4
(x-l)2
— xz+74x+7
(x2 +7)2
4x(x—3)
6.67. x#-3,x^1,y-(;c + 3)ł(jc_1?.
3- , —6x(l+3x—5x3)
1 , 1-J2
6.69. .y>0, x^l, y’= ——-tt=—: • 6.70. I>0, z =
6.71. s' = 21(3/ + l)6 . 6.72. u' = 5(4z2-5z + 13)4(8z-5)
6.73. 1^0, = (7+4) 1
6.74. i#0, s'-6^14f+i^7!2-y+6^
6.75 |*|>2, / = -7= • Vx—4
6.77. r<|. y' = l
(V2-31)3’
6.76. ax2+bx+c>0, z' =
6.78. 0<f<6, s' =
2 ax + b 2Vax2 + bx+c
t-3
(y/ót-t2)3
6.79. /=
4x2
6.81. /.
pnxp~l
P b
6.80. y=-4--
" 7(a + bx)',+"
1
(b-x',)" + 1 6.83. a*0, u' =
6.82. x>l, —
■Ja2+v1 (v-y/a2 +o2)
— a
6.84. —a<x<a, y =
(a+x)V(a+x)(a-x)
6.85. a2 —z2>0, o' =
V(a2 —z2)3
6.86. x>0, y
3(1 -3x2) 2n/x(x2 + 1)2 ’
, . *(**+2) 6.87. x# -1, y = 3/—-.— -
Wx! + 1)‘
6.88. (x — 1) (x—2) (x — 3) (x—4) > O, z' = 2a2x
•2x2 + 10x—11
6.89. x#a, z' =
6.91. b 5* db 1, =
(a2 +x2) Va4—x4 1-Vl-B2
B2 V1 — B2
6.93. a O, b' =-sin — .
a a
, —a a
6.95. x#0, y =—5- cos —.
x x
f
6.97. s' = 3sin6f.
, 4sint
6.99. cosr/O, s =—=-•
cos t
, — 30cos2f
6.100. sin2t^0, b =—r-r-— .
sin 2<
(x—3)(x—4)V(x— l)(x — 2)(x —3)(x—4) 6.90. 19*1, j' =-_________■
6.92. y'= u'vw+uv'\v+uvw' .
6.94. x' = ab cos bt.
6.96. z' = 4cos2x.
6.98. b'= — 5sin jłcos4 jt.
6.101. sin2l#0, s' =
'sin2 2r