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Working with the Factor Theorem

Below is the question we considered at the end of our lesson today. Complete this question for our next lesson.

Let \(p(x)=2x^3+ax^2-29x+60\). The polynomial \(p\) is divisible by \((x-3)\).

a) Find \(a\).

b) \(-4\) is also a zero of \(p\). Find the third zero of \(p\).

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Quadratics + Rational Functions Homework Assignment

Complete the questions in the file attached here and submit your work electronically (as a PDF).

Your file should be received before the beginning of our lesson on Sunday, November 13th. Note that the two bonus questions are optional, but I would encourage everyone to try at least one!

As always, you can write any questions you have about the assignment below in the comments section.

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Quadratics + Even and Odd Functions

For tomorrow’s lesson complete the following questions.

Pages 110–112 questions 28, 30, 31, 43

Also, see if you can answer the following question: Is the sum of two odd functions always an even function? (And similarly, is the sum of two odd functions always an odd function?)

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More Probability

Here are a few questions that will involve all of the material that we’ve covered so far. Complete these before our next lesson on Thursday.

Page 548–552 questions 6, 12, 13, 14, 16, 18, 20, 25

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Quadratic Functions Homework

Complete the following question for our next lesson on Tuesday. Remember, you can leave a comment below if you run in to any trouble with these!

Consider the quadratic function \(f(x) = 2x^2 + 4x -16\).

  1. Express \(f\) in factored form.
  2. Express \(f\) in vertex form.
  3. Describe a sequence of transformations that would produce the graph of \(y = f(x)\), starting from the graph of \(y = x^2\).
  4. Describe a sequence of transformations different from your answer to c) that would also produce the graph of \(y = f(x)\), starting from the graph of \(y = x^2\).
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Probability: The Basics

Here’s the question we saw at the end of today’s class. Can you find the answers?

There are 25 students in a tutor group. Within the group, there are 10 students taking HL Mathematics and 12 student taking HL Chemistry. In the group, there are 8 students who take neither HL Mathematics nor HL Chemistry.

What is the probability that a student selected at random from the tutor group is taking

a) both HL Mathematics and HL Chemistry?
b) either HL Mathematics or HL Chemistry?

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Calculus + Induction

Here’s the question we considered on Thursday. Now that you’ve got a solution for parts 1 and 2, complete part 3 as a homework assignment due on Tuesday, the 25th of October.

The function \(f\)is defined by \(f(x) = e^x \sin x\).

  1. Show that \(f”(x) = 2e^x \sin \left(x+\frac{\pi}{2}\right)\).
  2. Obtain a similar expression for \(f^{(4)}(x)\).
  3. Suggest an expression for \(f^{(2n)}(x), n \in \mathbb{Z}^+\), and prove your conjecture using mathematical induction.