Sequences - Geometric

Find the eighth term of this geometric sequence:

3, 9, 27, 81, ...

• 2187

• 6561

• 19683

• 729

Find the eighth term of this geometric sequence:

1024, 256, 64, 16, ...

Find the eighth term of this geometric sequence:

1, -2, 4, -8, ...

• -128

• 128

• 256

• -256

Find the nth term of the sequence:

1, 5, 25, 125, ...

Find the nth term of the sequence:

3, -12, 48, -192, ...

Find the nth term of the sequence:

81, 54, 36, 24, ...

The second and third terms of a geometric series are 2 and 10 respectively.

Find the first term in the series.

• 2

• 0.4

• 5

• 1

The first and fourth terms of a geometric series are 2 and 54 respectively.

Find the ninth term of the series.

• 4374

• 13122

• 27

• 13729

The third and fourth terms of a geometric series are 24 and 8 respectively.

Find the first term of the series.

• 648

• 72

• 216

The first and third terms of a geometric series are 6 and 24 respectively.

Select the two possible values for the common ratio

• 2

• 4

• -2