Sequences N-1 Notation

Identify the common difference.
97, 86, 75, 64, ...

• 8

• 11

• -11

• -8

Determine the sum of the series written in Sigma Notation. 

• -1

• 255

• 295

• 350

Evaluate.

• 112

• 99

• 140

• -8

Is this summation finite or infinite?

• Finite, because there are only 6 terms to add up.

• Infinite, because there are an infinite number of terms to add up.

Evaluate the arithmetic series described.

• 481

• 489

• 444

• 888

• 196
• 392
• 49
• 254

Calculate the sum.

• 66

• 14

• 704

• 114

Determine the sum of the series.

• 144

• 180

• 176

• 68

Evaluate the sum

• no sum exists

• 5

• 10

• 20

Write the nth term formula:  3.5 + 7 + 14 + 28 + 56

• a_n = 3.5(0.5)^n-1

• a_n = 3.5 + 2(n - 1)

• a_n = 3.5 + 3.5(n - 1)

• a_n = 3.5(2)^n-1