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Interpret derivative as gradient of tangent (#516)
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Interpret derivative as gradient of tangent (#516)
Understand
f
′
(
a
)
f'(a)
f
′
(
a
)
as the slope of the tangent line to
y
=
f
(
x
)
y=f(x)
y
=
f
(
x
)
at
x
=
a
x=a
x
=
a
.
