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Home Q & A Board Science-Related Homework Help Mathematics
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smag smag
wrote...
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11 years ago
Precalculus course... I thought of trying to find the domain of the inverse to get the range but it doesn't match with the calculator...
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wrote...
#1
11 years ago
Inside of sqrt must be >=0.
So 2-x>=0 <===> x>=2
(negative infinity, 2] is the domain.
the sign of sqrt(2-x) is negative so (negative infinity, 0] is your range.
wrote...
#2
11 years ago
domain is ( - ?, 2 ]

range is ( - ?, 0 ]
wrote...
#3
11 years ago
The domain are all of the values that the dependent variable, x ,can be : the sqrt cannot be negative, thus the domain is 2-x>0 or   x > 2

The range are all of the values that the independent variable, y, can be : since x can be any number greater than 2, the range is 0 < y < infinity
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