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Mathematics
Problem
Explain why the function
y
=
∣
x
∣
y=|x|
y
=
∣
x
∣
does not qualify as a solution to the differential equation
d
y
d
x
=
2
x
\dfrac{dy}{dx}=2x
d
x
d
y
=
2
x
on the entire real line.
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