#How do I do this?
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The antiderivative function needs to be twice as great as the maximum value of the original function
I am still not understanding you.
The maximum value of the original function is 1, but the antiderivative is a whole function. You can't say that a function is twice as great as a number if it is not just a constant itself.
Is the statement of your exercise translated? If so, can you share the original?
Yeah right here
Ah, there we go! That's more clear.
There is a problem, though. Arctangent doesn't have a maximum value, it only approaches it.
Ohhh that's probably why
Well, let's say they meant supremum instead of maximum value.
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.
So C = 2-π/2