Find the range of the function $f(x) = \arcsin x + \arccos x + \arctan x.$  All functions are in radians.
Question:
Find the range of the function $f(x) = \arcsin x + \arccos x + \arctan x.$  All functions are in radians.
Answer:
Let's think step by step.

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\left[ \frac{\pi}{4}, \frac{3 \pi}{4} \right]
Find the range of the function $f(x) = \arcsin x + \arccos x + \arctan x.$  All functions are in radians.
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