Analysis and Approaches for IBDP Maths Ebook 2 | Seite 295

Answers
69.2
69.3
69.4
1 2
y� �2 � x � 2
1 2
y � e � ( e �1)
x � x �
2
1 2 15 3
y � 2 � x � x � x �
2 2
Exercise 70
70.1 (a)
� � �
v�2sin
�t�
�
� 2 �
(b) 2.27 m
(c)
� � �
s� �2cos �t� ��
2
� 2 �
(d) Refer to solution
1
t
300
70.2 (a) v�150e
� 150
(b)
31
t � 300ln s
30
(c) Refer to solution
(d)
� 31 �
s �150�10 �ln �m
� 30 �
70.3 (a) (i)
1 1
�
3x
3( x�
3)
�t
3e
(ii) v �
�t
3 � e
(b) Refer to solution
1 1
70.4 (a) (i) �
4x
4( x�
4)
(b)
Chapter 16
Exercise 71
71.1 (a) 120
(b) 48
(c) 72
4e
(ii) a �
1 � e
Refer to solution
t�2
t�2
71.2 (a) 10080
(b) 30240
(c) 2880
71.3 (a) 5040
(b) 180
71.4 (a) 181440
(b) 145152
Exercise 72
72.1 (a) 210
(b) 50
(c) 155
72.2 (a) 8008
(b) 2646
(c) 4011
72.3 (a) 1209600
(b) 112
72.4 (a) r � 1 or r � 5
(b) 1
Chapter 17
Exercise 73
73.1 (a)
133
243
(b)
3
5
73.2 (a)
256
3125
(b)
4
9
73.3 (a)
3
5
(b)
5
9
73.4 (a)
4
7
(b) n � 3
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