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As x runs over all real numbers, tanh x takes values in which interval?
ABetween -1 and 1
BBetween 0 and 1
C1 and above
DAll real numbers
Answer & Solution
Correct answer: A. Between -1 and 1
tanh x = (e^(2x) - 1)/(e^(2x) + 1) is always strictly between -1 and 1 and approaches them at the extremes.
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