HPC Section 2.4 Part 2

Precalculus Section 2.4 Part 2

by Shane Devlin

Multiple Choice

What is the additive inverse?

1 + i

• 1 - i

• -1 - i

• -1 + i

• $$\frac{1}{1+i}$$  

Multiple Choice

What is the conjugate?

1 + i

• 1 - i

• -1 - i

• -1 + i

• $$\frac{1}{1+i}$$  

Multiple Choice

What is the product?

(1 + i)(1 - i)

• 0

• 2

• 1 - i

• -2

Multiple Choice

What is the additive inverse?

 3 - 5i

• -3 + 5i

• -3 - 5i

• 3 + 5i

• $$\frac{1}{3-5i}$$  

Multiple Choice

What is the conjugate?

 3 - 5i

• -3 + 5i

• -3 - 5i

• 3 + 5i

• $$\frac{1}{3-5i}$$  

Multiple Choice

What is the product?

(3 - 5i)(3 + 5i)

• -16

• -34

• 34

• 16 

​How do we use complex conjugates?
Writing the quotient in standard form:

​Write the quotient in standard form:

Draw

Getting the radical out of the denominator.

Multiple Choice

$$\frac{1+4i}{1-2i}$$  Write the quotient in standard form:

• $$\frac{9}{5}+\frac{2i}{5}$$  

• $$-\frac{7}{5}+\frac{6i}{5}$$  

• $$-\frac{7}{5}-\frac{2i}{5}$$  

• $$\frac{9}{5}+\frac{6i}{5}$$  

​Homework

​Page 133 - 134

# 4 – 6, 8, 12 – 40 mult of 4, 43 – 55 odd.