This week in Pre Calculus 11 we learned about Graphing Linear Inequalities in two variables. The solutions to these inequalities are represented by a boundary line and shading one side of the line.
Ex:
key notes
choosing any coordinate (the easy one is 0,0) and seeing if the statement is true or false.
Something I’ve learned this week is about domain and range.
At first I am so confused with domain and range, then I asked teacher.
that is what I learned from week 9.
This week in pc we analyzed the quadratic function. In the equation each variable represents something that can change the graph.
positive sign, the graph moves up, negative sign, the graph moves down.
positive sign, the graph moves right, negative sign, the graph moves left.
positive sign, the graph opens up, negative sign, the graph opens down.
greater than 1, the graph is stretched vertically, between 0 and1,
the graph is compressed vertically.
The opportunity for me to speak to some people with various careers. Overall my experience learning about these new jobs was inspiring. I talked to some talented people who I was so interested. these people helped me about open up my options on what I can do when I graduated from university.
I spoke with Lindsey Jackson. She has many different jobs, Writer/ Producer/ Researcher/ interviewer in Reality or Documentary TV. I learned that I do not have to focus on one job, I can have multiple jobs and combine them together. her job is not what her expected, because of everyday is a new adventure. This inspired me to realize that not everyday has to be the same, I could have a variety of places to work.
Then I spoke to Jennifer Nelson. She is an English teacher. English is very impotent for me also is hard. English is my second language, even if I work in China, I have to good at English, too. I learned that if I want to improve my English skill, I need make some Canadian friends, hang out with them, more talking, more listening.
the thing I learned in this week is Arithmetic sequences／series and Geometric sequences/ series.
sequences:5,9,13,17…
series:5+9+13+17…
Arithmetic sequences
Arithmetic series
geometric sequences
geometric series
Example
ex: Find the sum of the following arithmetic series 1,2,3…..99,100
We have a total of 100 values, so n=100. first value is 1 and the last is 100. We plug these values into our formula, get:
