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Calculus

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Submitted By Rubaiya
Words 590
Pages 3
Section 1.2 (Page 87) (Calculus Book): 14, 23, 26, 29, 30, 31, and 32 14.��������→��
���� +���� −����+�� ���� −����+��

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��→��

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��→�� ��→��

�� − ��, �� ≤ 3 ���� − ��, �� > 3

a. ������ �� �� = �� − �� = �� − �� = �� − b. ������ �� �� = ���� − �� = �� × �� − �� = �� + c. ������ �� �� = �� − �� = �� − �� = ��
��→��

�� − ��, �� < 0 32�� �� = ���� , �� ≤ �� ≤ �� ����, �� > 2 a. ������ �� ��
��→��

As‘t’ approaches to ‘0’ from the left side of the number line the applicable functionis ������ �� �� = �� − �� = �� − �� = −�� −
��→��

As ‘t’ approaches to ‘0’ from the right side of number line the applicable function is������ �� �� = ���� = ���� +
��→��

From this we can conclude that at �� = �� limit does not exist.

Page | 2

b. ������ �� ��
��→��

As ‘t’ approaches to ‘1’ from the both side of the number line the applicable function is������ �� �� = ���� = ���� = ��
��→��

c. ������ �� ��
��→��

As ‘t’ approaches to ‘2’ from the left side of the number line the applicable function is������ �� �� = ���� = ���� = �� −
��→��

As ‘t’ approaches to ‘2’ from the left side of the number line the applicable function is������ �� �� = ���� = ��. �� = �� +
��→��

As the one-sided limits are equal, we can conclude that �������� �� = ��
��→��

Section 1.3 (Page 97) (Calculus Book): 13, 17, 23, 27, 28, 29, and 30 13������
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Section 2.1 (Page 141) (Calculus Book): 15, 16 A function y = f(x) and an x-value ���� are given. (a) Find a formula for the slope of the tangent line to the graph of f at a general point �� = ���� . (b) Use the formula obtained in part (a) to find the slope of the tangent line for the given value of ���� . 15 �� �� = ���� − �� ; ���� = −�� A. �������� = ������
�� �� − �� ���� ��−���� ��→����

���� − �� − ���� − �� �� = ������ ��→���� �� − ���� ���� − ���� �� = ������ ��→���� �� − ����

Page | 6

= ������ �� + ����
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= ���� + ���� + �� = ������ + �� c. �������� = ������ + �� = �� �� + �� = ��

Page | 7

Section 2.2 (Page 152) (Calculus Book): 12,14,17,20 According to definition 2.2.1, the function ��′ defined by the formula ��′ �� = ������
��→�� ′ �� ��+�� −�� �� ��

is called the derivative of ′��′ with respect to ′��′ . The domain of

�� consists of all x in the domain of f for which the limit exists. 12 �� �� = ������ + ��; �� = −�� ��′ −�� = ������ = ������
��→�� ��→��

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��

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��

+ �� = −�� + �� = −��

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⟹ ������
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Page | 8

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Now, �� �� = �� × �� + �� = �� = �� ��′ �� = �� ��

������ �������������� ��������, �� − ���� = �� �� − ���� ⟹ �� − �� = 17. �� = ���� − �� According to formula 12,
���� ����

�� �� �� �� − �� ⟹ �� = �� + �� �� ��

= ������

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Page | 9

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Page | 10

= ��

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Section 2.3 (Page 161) (Calculus Book): 5, 6, 10, 13, 17, 41(c), 42 (b), 44 5 �� = ���� ⟹ 6 �� = ���� +
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= ��. ���� − �� + �� = ������ − �� ��′ �� = ���� −�� − �� = −����

Page | 11

41(c)�� = ∴

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�� �� �� − ��−�� = �� ������ + ����−�� = ���� ������ + ����−�� ���� �� ������ + ����−�� = ���� ��. ������ − ��. ����−�� = ���� ������ − ����−�� ����

∴ ��′′′ = ����

Section 2.4 (Page 168) (Calculus Book): 7, 22, and 21 7 �� �� = ���� + ������ − �� ����−�� + ��−�� = ������−�� + ��������−�� − ������−�� + ����−�� + ������−�� − ����−�� = �� + ������−�� − ������−�� + ��−�� + ����−�� − ����−�� = �� + ������−�� + ����−�� − ������−�� − ����−�� ��′ �� = �� �� + ������−�� + ����−�� − ������−�� − ����−�� ����

= �� − ������−�� − ������−�� + ������−�� + ������−�� = ������−�� + ������−�� − ������−�� − ������−�� 21 �� =
����+�� ��

��−�� + ��

������−�� + ����−�� + ���� + �� = ��

Page | 12

����−�� + ����−�� + ���� + �� = �� = ����−�� + ����−�� + ����−�� + �� ���� �� = ����−�� + ����−�� + ����−�� + �� = −������−�� − ������−�� − ����−�� ���� ���� ���� = −���� − ���� − �� = −���� ����⃒��=�� 22 �� = ������ − ���� �� + �� ���� = ����
�� ���� ��−�� ��+��

=

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��

�� + ��

�� + �� �������� − ������ − �������� + ���� − ������ − ���� − ������ + ���� �� = �� + �� �� ���� �� + �� ����. ���� − ��. ���� − ����. ���� + ��. �� − ��. ���� − ���� − ��. ���� + ���� = ����⃒��=�� �� + �� �� = = ��. �� − �� �� �� ��

Section 2.6 (Page 179) (Calculus Book): 9, 15, 18, 22, 23, 24, and 27 9 �� �� = ���� − �� �� �� = ����
′ �� �� �� −�� �� −��

�� �� − ��
−��

�� = −�� �� − ��

�� �� ���� − ���� ��
Page | 13

�� = −�� �� − ��
��

−��

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15 �� �� = ������ ∴ ��′ �� =

�� �� ������ �� ���� ��

= ������

�� �� �� �� = −����−�� ������ �� ���� ���� ���� ��

18 �� �� = ���� + �� �������� �� ∴ ��′ �� = �� ���� + �� �������� �� ���� �� �������� ����

= �� + ��. �� �������� ��

= �� + ���� �������� �������� �� 22 �� �� = �������� ∴ ��′ �� = = �� ��������
�� ��+��

�� �� �� �� �� �������� = ���������� ������ ���� �� + �� �� + �� ���� �� + �� �� �� + �� �� �� + �� �� �� + �� �� �� + ��
��

−������

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�� ����

= �� ��������

�� −������ �� + �� −������ ������ �� �� + �� �� �� + �� ������

�� − �� �� + ��
��

�� ����

�� + ��

= �� ��������

�� + �� �� − �� �� + �� �� + �� �� �� �� + �� �� �� + ��
��

= −�� �������� = −��

�� �� + ��

��������

�� �� + ��

23 �� �� =

������ ����
Page | 14

∴ ��′ �� = = ��

�� ����

������ ����

�� ������ ���� �� ������ ���� ���� �� �� ������ ���� �� �� ������ ���� −������ ���� �� ���� ����

=

=−

������ ����

24 �� �� = ∴ ��′ �� = = �� ���� �� �� ���� −

���� − �������� ���� ���� − �������� ���� �� ���� ���� − �������� ���� �� ������ ���� ���� �� ���� ����

�������� ��

����

=

�� ���� − �������� ���� �� �� ���� − �������� ���� �� �� ���� − �������� ����

�� − �������� ����

=

�� − �������� ���� ������ ����

=

�� − �������� ���� ������ ���� × ��

=

�� − �������� ���� ������ ���� �� ���� − �������� ����

27 �� = ���� �������� ���� ���� �� = ���� �������� ���� ���� ���� + �������� ���� �� �� �� ����
Page | 15

= ���� . �������� ����

�� ������ ���� + �������� ���� ������ ���� �� ���� + �������� ���� ������ ����

= ���� . �������� ���� . ������ ���� .

= �������� ���� ������ + �������� ������ ���� ������ ���� Section 3.1 (Page 190) (Calculus Book): 5, 13, and 15 5 ���� �� + �������� − �� = �� ⟹ �� �� �� �� �� + �������� − �� = �� ���� ���� ���� ���� + ������ + ����. ������ . − �� = �� ���� ����

⟹ ��. ���� + ���� . ⟹

���� �� �� + �������� = �� − ������ ����

���� �� − ������ − ������ ⇒ = ���� ���� + �������� 13 ������ − ������ = �� … … (��) ⟹ �� �� ������ − ������ = �� ���� ���� ���� = �� … … (����) ����

∴ ���� − ����. ⇒ −����. ⇒ ����. ∴

���� = −���� ����

���� = ���� ����

���� ���� = … … ������ ���� ���� �� ���� �� ���� − ����. = �� ���� ���� ����
Page | 16

������, ������������������������������ ���� − ����, ���� �������� →

⟹ �� − ����

�� ���� ���� ����

+ ��

���� �� �� ���� ����

= ��

���� �� ���� ���� ⟹ �� − ���� . �� − ��. . = �� ���� ���� ���� ���� �� ���� ⟹ �� − ���� . �� − ��. ���� ���� ���� �� ���� ⇒ ���� . �� = �� − �� ���� ���� �� �� = ������
�� ��

= ��
��

�������� ���� − ������,

���� ���� = ���� ����

�� − �� ����

������ ������



���� �� �� ������ ⇒ = − ������ ���� ������ ���� �� ������ − ������ ⇒ = ������ ������ ���� �� −��(������ − ������ ) ⇒ �������� ���� − �� , ������ − ������ = �� �� = �� ���� ���� ���� �� −��. �� �� ∴ = = − �� ������ ������ ���� 15���� ���� − �� = �� ⇒ �� �� �� �� �� �� − �� = �� ���� ���� ���� − �� = �� ���� ���� = �� ����

⇒ ���� . ������ + ���� . ������ ⇒ ���� . ������ + ���� . ������

Page | 17

���� ���� . ������ �� ⇒ = − �� =− ���� �� . ������ �� ∴ �� ���� �� �� = − ���� ���� ���� ��
���� ��

��. − − �� ��. − ��. �� ���� �� ���� �� �� ���� ∴ =− =− ���� =− ������ ���� ���� ���� �� =−
−���� ����

=

���� ����

Section 4.1 (Page 242) (Calculus Book): 19, 20 Find: (a) the intervals on which f is increasing, (b) the intervals on which f is decreasing, (c) the open intervals on which f is concave up, (d) the open intervals on which f is concave down, and (e) the xcoordinates of all inflection points 19 �� = ������ − ������ ��′ = �������� − �������� = �������� �� − �� ��′′ = �������� − ������ = ������ �� − �� ��

a. The interval on which �� is increasing is (��, +∞) b. The interval on which f is decreasing is −∞, �� c. From ��′′ we can see that, for �� = �� & ; ��′′ is zero. So the function is
�� ��

concave up in the open interval −∞, �� ,

�� ��

, +∞
�� ��

d. The function is concave down in the open interval ��,

Page | 18

e. X coordinate for inflection points are : 0, 2/3 20 �� �� = ���� − ������ + ������ ��′ �� = ������ − �������� + ������ ��′′ �� = �������� − ������ + ���� = �� ������ − ���� − ���� + �� = �� ���� �� − �� − �� �� − �� = ��(�� − ��)(���� − ��) a. The interval on which f is increasing is (��, +∞) b. The interval on which f is decreasing is −∞, �� c. From ��′′ we can see that, for �� = �� & ; ��′′ is zero. So the function is
�� ��

concave up in the open interval(−∞, ��), (��/��, +∞) d. The function is concave down in the open interval ��, e. X coordinate for inflection points are : ��,
�� �� �� ��

Exercise 7.4 (page 169) (Chiang’s Book): 1(b), 2(b) 1(b) �� = ������ + ������ ���� − ������ �� �� �� �� �� = ������ + ������ ���� − ������ �� �� ������ ������
Page | 19

⇒ ⇒

���� �� �� = �� ���� + ������ �� − �� �� ������ ������ ������ �� ���� = �� + ������ �� ������

�� �� �� = ������ + ������ ���� − ������ �� �� ������ ������ ⇒ ⇒ ⇒ ���� �� �� = �� + ������ ���� − �� ���� �� ������ ������ ������ �� ���� = ������ ∗ ������ − �� ∗ ������ �� ������ ���� = �������� ���� − �������� �� ������

2(b) �� ��, �� = ���� − ���� �� − �� = (���� − ������ − ������ + ����) ���� = = = �� �� ��, �� ����

�� ���� − ������ − ������ + ���� ���� �� �� �� �� �� �� �� − ���� �� − �� �� + �� (��) ���� ���� ���� ����

= ������ − ���� − ����

���� = = =

�� �� ��, �� ����

�� ���� − ������ − ������ + ���� ���� �� �� �� �� �� �� �� − ���� �� − �� �� + �� �� ���� ���� ���� ����
Page | 20

= �� − ���� − �� + �� = �� − ����

Page | 21

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