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Mathematics
Problem
The function
r
(
x
)
=
2
x
−
5
x
+
3
r(x)=\dfrac{2x-5}{x+3}
r
(
x
)
=
x
+
3
2
x
−
5
is differentiable at
x
=
0
x=0
x
=
0
but not at
x
=
−
3
x=-3
x
=
−
3
. Explain why.
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