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Mathematics
Mathematics
Problem
For
x
>
0
x>0
x
>
0
, let
y
=
arctan
(
1
x
)
y=\arctan\!\left(\dfrac{1}{x}\right)
y
=
arctan
(
x
1
)
. Evaluate
y
′
′
′
(
1
)
y'''(1)
y
′′′
(
1
)
.
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