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Mathematics
Problem
For answers and explanations, turn to Chapter 19. 22. Find
f
′
(
x
)
f^{\prime}(x)
f
′
(
x
)
at
x
=
1
x=1
x
=
1
if
f
(
x
)
=
[
x
−
x
x
+
x
]
2
f(x)=\left[\frac{x-\sqrt{x}}{x+\sqrt{x}}\right]^{2}
f
(
x
)
=
[
x
+
x
x
−
x
]
2
.
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