#How do I do this?

11 messages · Page 1 of 1 (latest)

paper yew
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The maximum value needs to be twice as great as what?

lilac grail
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The antiderivative function needs to be twice as great as the maximum value of the original function

paper yew
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Is the statement of your exercise translated? If so, can you share the original?

lilac grail
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Yeah right here

paper yew
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Ah, there we go! That's more clear.

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There is a problem, though. Arctangent doesn't have a maximum value, it only approaches it.

lilac grail
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Ohhh that's probably why

paper yew
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Well, let's say they meant supremum instead of maximum value.

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arctan(x) tends to its supremum π/2 as x -> +∞.
So, arctan(x) + C -> π/2 + C, x -> +∞.
You need that to be twice the maximum value of the derivative, which is 1. So:
π/2 + C = 2
Solve it to get C, the graph it.

lilac grail
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So C = 2-π/2