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Find the domain and range of the function f(x) = cbrt-x+7.
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Step-by-step solution
2 stepsTo find the domain and range of the function :
Determine the domain.
The function involves a cube root. Unlike square roots, a cube root can take any real number (positive, negative, or zero) as its argument. There are no restrictions on the expression inside a cube root.
Therefore, the expression can be any real number.
The domain of is all real numbers.
In interval notation, this is .Determine the range.
Let . So, .
To find the range, we can try to express in terms of :
First, cube both sides of the equation:Now, solve for :
Since can take any real value (as can be any real number), the expression can also take any real value. This means that for any real value of , there is a corresponding real value of .
Therefore, the range of is all real numbers.
In interval notation, this is .The domain of is .
The range of is .
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