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Key Equations
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Aa
Key Equations
Linear approximation
L
(
x
)
=
f
(
a
)
+
f
′
(
a
)
(
x
−
a
)
L
(
x
)
=
f
(
a
)
+
f
′
(
a
)
(
x
−
a
)
A differential
d
y
=
f
′
(
x
)
d
x
.
d
y
=
f
′
(
x
)
d
x
.
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