Analysis and Approaches for IBDP Maths Ebook 2 | Page 269

(j) (1) Concave downward
(2) The area of A
n
is always greater than the area of
(k) (1) 0
B
n
.
(2)
A
n
�B
n
1
�
nn ( �1)
0 � Bn � An � An � Bn
1
�0
� Bn
� An
�
nn ( �1)
lim0 � 0 and
n��
�lim A � lim B � 0
n��
n
n��
1
lim � 0
n��
nn ( �1)
n
20
www.seprodstore.com
259