T1.1 Number patterns: sequences, series and sigma notation

Question 1

What is a sequence?

Answer 1

A collection of numbers in a defined order.

Question 2

What is a series?

Answer 2

Adding all terms in a sequence

Question 3

How many types of series are there?

Answer 3

2. Finite if it has fixed numbers, otherwise infinite

Question 4

What is a harmonic series?

Answer 4

General term is 1/r => 1+1/2+1/3+1/4+…+1/r+…

Question 5

Explain the sigma notation

Answer 5

The largest value on the top, bottom the smallest. “The summation of 1/r from r=1 to 20’