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    For this question it states that 'the domain of each of the following functions is the set of values of x for which the algebraic expression has meaning.Find their ranges.'
    What does it mean for an algebraic expression to have a meaning in this context?
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    (Original post by surreal123)
    For this question it states that 'the domain of each of the following functions is the set of values of x for which the algebraic expression has meaning.Find their ranges.'
    What does it mean for an algebraic expression to have a meaning in this context?
    E.g. \sin^{-1}(x) - that's the inverse, not the reciprocal - is only meaningful for -1 <= x <= 1

    \ln(x) is only meaningful for x>0.

    Assuming we're sticking to real numbers.
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    A physical example would be that you might have an equation for distance that went like:

    distance = x + 2.

    x>= -2 would be the range of meaning here because you cannot have a negative distance.
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    (Original post by ghostwalker)
    E.g. \sin^{-1}(x) - that's the inverse, not the reciprocal - is only meaningful for -1 <= x <= 1

    \ln(x) is only meaningful for x>0.

    Assuming we're sticking to real numbers.
    Thank you!
 
 
 
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