limit(atanh(x),x,1) => minf NO
This should be complex infinity (INFINITY) since for x>1, the imagpart = -%pi/2
ERROR: The number 1 isn't in the domain of atanh
Well, that's why I'm trying to take the limit!
limit( atanh(a-1)-log(a)/2 , a, 0) => domain error
but as taylor will show you, it is finite: -log(2)/2.
Same problems at -1.
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