Heyy, so this week wasn't so bad for me. I seem to understand domain and range when it comes to the domain of all polynomials. All you do for the range is use x= -b/2a which gives you your point.
The fractions are pretty easy to deal with. Just set the denominator = 0. Solve for X. Then set up intervals.
The number behind the absolute value tells you where to shift. For example: /x+4/-1. The negative 1 means that you are going to shift down 1. Your range is going to be the number outside the absolute value,00. such as [-1,00)
*** You use a bracket when you have a square root or absolute value.
I could use some help with the square roots. On the homework page 122 #12 a,b,&c are giving me trouble. if anyone finished the homework and knows how to do this problem please show me how you did it! Thaanks so much.
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When you are finding the domain of square roots,
ReplyDelete1. place what is UNDER the radical =0
2. solve for x
3. set up a number line
4. inter values from both sides of your x-value(s)
5. eleminate any -ve answers and the side of your x-value from which they originated.
6. set up intervals
**if a number on the -ve side of your number is eleminated so is -∞. And vice versa with the +ve side. If one side is eleminated, say -∞ side, your intervals would be (-x,x)u(x, +∞).