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Question 8
Mu
Implicit Differentiation
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Question
Let
f
(
x
)
=
x
1
+
x
1
+
x
1
+
⋱
f(x)=\cfrac{x}{1+\cfrac{x}{1+\cfrac{x}{1+\ddots}}}
f
(
x
)
=
1
+
1
+
1
+
⋱
x
x
x
. Find
f
′
(
20
)
f'(20)
f
′
(
20
)
.
A.
1
10
\frac1{10}
10
1
B.
1
11
\frac1{11}
11
1
C.
1
8
\frac18
8
1
D.
1
9
\frac19
9
1
E.
NOTA
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