Apps. and Interpretation for IBDP Maths Ebook 1 | Page 72

Your Practice Set – Applications and Interpretation for IBDP Mathematics
Chapter
8
Geometric Sequences
SUMMARY POINTs
�
Properties of a geometric sequence u
n
:
1. u
1
: First term
2. r u2 u1 un
un
� 1
3.
� � � � : Common ratio
u u r �
n 1
n
�
1
� : General term ( n th term)
1
4. (1 n
u � r
S
)
n
� : The sum of the first n terms
1�
r
Solutions of Chapter 8
62
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