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Mathematics
Problem
Let
d
y
d
x
=
x
+
y
\dfrac{dy}{dx}=x+y
d
x
d
y
=
x
+
y
with
y
(
0
)
=
1
y(0)=1
y
(
0
)
=
1
. Using a single tangent-line step of size
h
=
0.2
h=0.2
h
=
0.2
, which of the following is the best numerical estimate of
y
(
0.2
)
y(0.2)
y
(
0.2
)
? a)
1.24
1.24
1.24
b)
1.2
1.2
1.2
c)
1.04
1.04
1.04
d)
1.02
1.02
1.02
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