Write a geometric sequence in summation notation

The video tutorial explains how to write a geometric sequence in summation notation. It begins by introducing the concept of summation notation and the sigma symbol. The instructor then demonstrates how to determine the rule for a geometric sequence by identifying the first term and the common ratio. Finally, the sequence is expressed in sigma notation, with an explanation of how to set the starting point and upper limit for the sequence.

What symbol is used to represent summation notation?

• Alpha

• Beta

• Sigma

• Delta

In a geometric sequence, what is the first term referred to as?

• a sub 0

• n

• r

• a sub 1

How can you find the common ratio in a geometric sequence?

• Subtract the first term from the second term

• Multiply the first term by the second term

• Divide any term by its previous term

• Add the first term to the second term

What is the purpose of setting an upper limit in summation notation?

• To calculate the last term

• To specify the number of terms to sum

• To find the common ratio

• To determine the first term

Why do we start at n equals 1 in the given sequence?

• To simplify the calculation

• To make the common ratio one

• To ensure the first term is zero

• To match the first term of the sequence