Arithmetic and Geometric Sequences

Is this an Arithmetic sequence? x+3, x+6, x+9

• Yes
• No

Find the first term of the given sequence:

u₁₄=68

d=3

• 14

• 20

• 26

• 29

Write the explicit formula (u_n) for the geometric sequence.

• a_n = 10(2)^n-1

• a_n = 2(10)^n-1

• a_n = 10(2)ⁿ

• a_n = 2(10)ⁿ

Find the common ratio for the geometric sequence.

• -4
• 4
• 1/4
• -1/4

Given a geometric sequence with terms: u₂: -4 u₅: 32

Find u_n and u₁₀

• u_n=2(-2)^n-1 u₁₀= 1024

• u_n=2(-2)^n-1 u₁₀= -1024

• u_n=2(2)^n-1 u₁₀= 512

• u_n=2(-2)^n-1 u₁₀= -512

Determine whether the sequence is arithmetic, geometric, or neither.

• arithmetic
• geometric
• neither

Is this an arithmetic sequence?  91, 87, 84, 79

• Yes
• No

Determine whether the sequence is arithmetic, geometric, or neither.

• arithmetic
• geometric
• neither

Find the common ratio for the geometric sequence.

• 2/3
• 3/2
• -2/3
• -3/2

What is the common difference? 1213, 1172, 1131, 1090

• 42
• 41
• There is not one
• -41