Analysis and Approaches for IBDP Maths Ebook 1 | Page 41

Front Page
Chapter
4
4
Exponential and
Logarithmic Functions
SUMMARY POINTs
�
y
x
� : Exponential function, where 1
a
a �
�
Methods of solving an exponential equation
1. Change b into
y
a such that
2. Take logarithm for both sides
x
a
� b:
x y
a � a � x � y
�
y� log a
x: Logarithmic function, where a � 0
� log log10
y � x � x : Common Logarithmic function
� y �ln x � log e
x : Natural Logarithmic function, where e � 2.71828... is an
exponential number
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