I don't get it.... I checked my book for the answers and it shows usless info
2 answers:
You might be interested in
Answer:
1-
2- 1
3- -2
Step-by-step explanation:
1-
Add the numbers :
Reduce the fraction with 5 :
Solution :
2-
Calculate the difference:
Divide: 1
Solution: 1
3-
Subtract the numbers:
Reduce the fraction : -2
Solution: -2
Answer:
B. f(x) = 3/(x^2 +2x +1)
E. f(x) = 5/(3+x)
Step-by-step explanation:
The above functions have denominators that are zero at one point. For B, that point is x=-1; for E, that point is x=-3. When the denominator is zero, the function is undefined, so the corresponding x-value must be excluded from the domain.
__
As written, choice D also qualifies. This is because the function written in the answer list here is ...
It will be undefined for x=0.
_____
<em>Comment on writing rational functions</em>
When the division symbol (/ or ÷) is used with a denominator that is a product or sum, that product or sum must be enclosed in parentheses. When the expression is typeset, the division bar acts as a grouping symbol. When the expression is written in text, a grouping symbol, such as parentheses, must be added.