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2
Chapter 2 contents
2.10
Solution
2.12
Higher order partial derivatives
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2.11
Notation for partial derivatives
We sometimes write partial derivatives as subscripts
f
x
=
∂
f
∂
x
and
f
y
=
∂
f
∂
y
.
f_{x}={{\partial f}\over{\partial x}}\quad{\hbox{and}}\quad f_{y}={{\partial f% }\over{\partial y}}.