Answer:
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Step-by-step explanation:
1. Direction Fields. Sketch the direction field for each of the following ordinary differential equations.
(a) dy
dx = x
2 − y
2
, (b) dy
dx =
x
2 − y
2
x
2 + y
2
, (c) dy
dx =
x
2
y
2
, (d) dy
dx = x − y
