Apps. and Interpretation for IBDP Maths Ebook 1 | Page 196

Your Practice Set – Applications and Interpretation for IBDP Mathematics
SUMMARY POINTs
�
Tangents and normals:
1. f� ( a)
: Slope of tangent at x�
a
2.
�1
f�( a)
: Slope of normal at x�
a
3. y � f ( a) � f �( a)( x � a)
: Equation of tangent at x�
a
4.
y f 1
( a � � �
� ) � � ( )
f ( a)
x �
�
� a
� �
: Equation of normal at x�
a
Solutions of Chapter 15
186
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