Sequences Series and Summation

This symbol is:

• a funky looking "E"

• theta

• pi

• sigma

Write an explicit formula for a_n​, the nth term of the sequence 9, 13, 17, ...

• a_n = 9 + 4(n-1)

• a_n = 9 - 4(n-1)

• a_n = 9 + 4(n)

• a_n = 9 * 4^n-1

Find the common ratio of the geometric sequence 11, -55, 275,...

• -5

• 5

• 25

• -25

The series is written in summation notation, what is the value of the term when the index, k, equals 3?

Find the sum of the arithmetic series using a formula.

• 516, 240

• 516,242

• 116, 242

• 506, 242

Find the indicated sum

What is the sum of the first 50 terms of the series 2 + 17 + 32 + 47 + ...?

• 1,600

• 18,235

• 18,475

• 19,125

What is the sum of the first 50 terms of the series 2 + 17 + 32 + 47 + . . . 737 ?

Which of the following is the sum of first 17 terms of AP 4, 8, 12, 16……..?

• 626

• 627

• 628

• 612