Monday, December 9, 2013

SP #6: Unit K Concept 10: Writing a repeating decimal as a rational number using geometric series

What you guys really need to look out for is the "r" variable and how you get that because most students I believe get that wrong idea. If you have any comments or questions please leave a comment! :)

Wednesday, November 13, 2013

SV#5 Unit J: Concept 3-4

What should you be careful about? Everything! There are small mistakes that people do a lot and I don't want you guys to do a small mistake! But when you're watching my video please be really be careful when I change the signs when I'm doing the elementary row operations, which in fact have confused a lot of people in the past so yeah. :P Be careful! But other than that I think you guys should be okay! :D

Student Video #3 Unit H Concept 7 : Finding logs given approximations

Hey you guys! The tip that I'm going to give you guys tonight is that you should really be careful with the fraction because REMEMBER ! When we have a fraction and we're already done with solving the numerator be really careful after solving that because it converts into a negative! You should also really look out for the hand movements because it shows you what I'm doing as I'm speaking. But yeah. That's about it! Thanks for watching my video. :)

Monday, October 7, 2013

SV#2: Unit G Concepts 1-7 - Finding all parts and graphing a rational function

To graph a rational function, you find the asymptotes and the intercepts, plot a few points, and then sketch in the graph. Once you get the swing of things, rational functions are actually fairly simple to graph. Let's work through a problem. • When you draw your graph, make sure you show the graph continuing off to the sides. • Don't just stop at a point you've drawn, because this will make it look as though the graph actually stops at that point. • Warning: Your calculator may display a misleading graph for a given rational function. When you graph, you plot some points and then you connect them. Your calculator does the same thing. But you're smart enough to know not to cross a vertical asymptote. Your calculator isn't that intelligent.

Monday, September 30, 2013

SV#1: Unit F Concept 10 - Finding all real and imaginary zeroes of a polynomial

• So today you guys will be learning how to find my student video problem today, which is 10x^4 + 27x^3 - 55x^2 + 13x + 5. • One thing you guys should really be paying attention to are the sign changes for those who do not understand what those sign changes do. But more importantly just try to focus how I set it up and why I did that.

Tuesday, September 17, 2013

SP#2: Unit E Concept 7 - Graphing a polynomial and identifying all key parts

In this picture we'll be finding on how to find the end behaviors (describes how a graph acts at the extremes - as we go really far to the left (get closer to negative infinity) or as we go really far to the right (get closer to positive infinity). Remember, because this is what happens in the extremes, this tells us nothing about what is happening in the middle - how many ups and downs there are, how many zeroes there are, etc. We just don't care about it. Polynomial end behavior is quite predictable. It is based on two things: 1)Degree & 2)Leading Coefficient. (SECOND PARAGRAPH) But the main goal here in this picture is to know whether this graph will have to go: thru, bounce, or curve at some point. As you can see my equation is y=x^4-13x^2+36. What we first want to do is factor it out to get (x-3)(x+3)(x+2)(x-2). Next, finding the end behavior. The end behavior is as x-> inf., f(x) -> inf. As x -> -inf., f(x) -> inf. In the same manner, 3M1,-3M1,-2M1,2M1. Finally, the y-intercept should be (0,36) because as you plug in 0 in the x's you get 36.

Wednesday, September 11, 2013

WPP#3: Unit E Concept 2 - Path of Football (or other object)

Create your own Playlist on MentorMob!

SP#1: Unit E Concept 1 - Graphing a quadratic and identifying all key parts

Our equations will start in standard form f(x) = ax^2 + bx +c. In order to graph them more easily, we MUST complete the square to put it in the parent function form, like this: f(x) = a(x-h)^2 + k. Our graph will include between 2 and 4 points the vertex, y-intercept, and up to two x-intercepts, as well as one dotted line (the axis). (SECOND PARAGRAPH) So in order to solve this parent graph function you must follow step by step. You start off with the original function and work your way down to the bottom. Next you have to equal the function to zero and from there you have to complete the square. And after that you'll have two things. The graph problem solving and the solving itself to find x-intercepts.