Finding Values in Arithmetic and Geometric Sequences

The sequence (a)   is NOT an arithmetic sequence.

• -7, -13, -19, -25,...

• -10, -6, -2, 2,..

• 6, 8, 10, 12,...

• 3, 15, 75, 375,...

What is the 67^th term of the following arithmetic sequence.

13, 22, 31, 40, ...

• -445

• 67

• 625

• 607

Which of the following is the correct formula in finding the nth term of an arithmetic sequence?

• a_n = a₁ + (n - 1)d

• a_n = a₁ + (n + 1)d

• a_n = a₁ - (n - 1)d

• a_n = a₁ +- (n + 1)d

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

• Arithmetic

• Geometric

Answer explanation

Percentages are almost always Geometric.

• Arithmetic

• Geometric

Answer explanation

Percentages are almost always Geometric.

What type of series is
32 + 16 + 8 + 4 + 2 + 1

• Finite Arithmetic

• Finite Geometric

• Infinite Arithmetic

• Infinite Geometric

Find the first 6 terms of the sequence.

• 13, 19, 25, 31, 37, 43

• 7, 13, 19, 25, 31, 37

• 1, 7, 13, 19, 25, 31

• 7, 12, 17, 22, 27, 32

Create the explicit formula for the sequence:
2, 8, 14, ...
(Hint:  Write your formula and then simplify it.)

• a_n=2+6n

• a_n=-6+6n

• a_n=6n-4

• a_n=4-6n

Find the 93rd term of the arithmetic sequence -5, -15, -25, ...

• -920

• -925

• -930

• -935