We went all the way back to chapter 4. it is a review from algebra 2 last year. i found section 1 to be kinda easy but im still working on trying to get better at. section 1 deals with finding the domain and range. there are four ways to do this.
1. Polynomial- they have no variable in denominator
the domain will always be (-infinity, infinity)
the range will always be (-infinity, infinity) if the degree of the polynomial is odd otherwise you will not have a range.
2. Square roots-
domain-you have to set equal to zero and solve for x.
then you put it on a number line
and plug in the numbers
range- use a [vertical shift, infinity)
3. Fractions
Domain- set the bottom equal to zero and solve for x
then set up intervals
Range- take limits x(infinity)
4. Absolute value
Domain: (-infinity, infinity)
Range: ( zero, infinity)
example:3x3+4x2-7x
domain: ( -infinity, infinity)
range: (-infinity, infinity)
i hope this helped some of yall better understand this chapter and section. if you need help just ask me. i get this chapter for the most part.
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