Q4 Reviewer

A _______ is a set of numbers with a common ratio

• Arithmetic Sequence

• Geometric Sequence

• Arithmetic Series

• Geometric Series

A _______ is a set of numbers with a common difference

• Arithmetic Sequence

• Geometric Sequence

• Arithmetic Series

• Geometric Series

A number sequence has nth term 5n + 2

Write down the first four terms of this sequence.

Find the 20^th of 2, 6, 10, ...

• 78

• 68

• 58

• 48

Write a formula for the following sequence:

1, 4, 7, 10, 13...

• a_n = 3n - 2

• a_n = 8 - 5n

• a_n = 5 + 3n

• a_n = 5(3)^n-1

What is the 50th term in the sequence a_n = 4n-12?

• 186

• -186

• 188

• -188

 $\frac{7!}{2!5!}+\frac{7!}{4!3!}$  

Simplify this

• 6

• 30

• 1/5

• 1/6

Calculate the length of BC

• 24
• 20
• 27
• 23

Which of the following formulas shows the Law of Cosines?

• c² = a² + b² - ab cos C

• c = a² + b² - ab cos C

• c² = a² + b² - 2bc cos C

• c² = a² + b² - 2ab cos C