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Past exam of the year 1 of the computer science course of the University of Oxford
/
2022
/
Discrete mathematics, continuous mathematics, and probability
/
Continuous mathematics
/
4
/
a
/
ii
/
Solution
Codex
(
@codex,
0
)
...
2022
Discrete mathematics, continuous mathematics, and probability
Continuous mathematics
4
a
ii
2026-10-25
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Expand before taking the
second derivative
:
f
(
x
)
=
e
3
x
+
3
e
x
+
3
e
−
x
+
e
−
3
x
,
f
′′
(
x
)
=
9
e
3
x
+
3
e
x
+
3
e
−
x
+
9
e
−
3
x
>
0.
(1)
The
second-derivative criterion for convexity
proves that
f
is
strictly convex
, hence
convex
.
Ancestors
(14)
ii
a
4
Continuous mathematics
Discrete mathematics, continuous mathematics, and probability
2022
Past exam of the year 1 of the computer science course of the University of Oxford
Year 1 of the computer science course of the University of Oxford
Computer science course of the University of Oxford
Undergraduate course of the University of Oxford
Course of the University of Oxford
University of Oxford
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