Geometric Sequences

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

• arithmetic
• geometric
• neither

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

• arithmetic
• geometric
• neither

Arithmetic, geometric, or neither?

4, 9, 14, 19, ...

• Arithmetic

• Geometric

• Neither

Arithmetic, geometric, or neither?

100, 50, 25, 12.5, ...

• Arithmetic

• Geometric

• Neither

Arithmetic, geometric, or neither?

1, 3, 7, 13, ...

• Arithmetic

• Geometric

• Neither

Is the sequence 2, 4, 12, 48,... geometric?

• yes
• no

Find the common ratio for the geometric sequence.

• 10
• 1/2
• 2
• 4

Find the common ratio for the geometric sequence.

• -4
• 4
• 1/4
• -1/4

Write the explicit formula for the geometric sequence.

• a_n = 4(3)^n-1
• a_n = 3(4)^n-1
• a_n = -4(3)^n-1
• a_n = 3(-4)^n-1

Find a₁₂ in the sequence -1, -3, -9, -27, ...

• -177,147
• -19,683
• -59,049
• 118,098