Geometric Sequences

Front

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

Back

no

Front

What is the common ratio for the sequence:
28, 14, 7, 3.5...

Back

1/2

Front

Find the common ratio: 4, -16, 64, -256, ...

Back

r = -4

Front

Find the common ratio: 64, -16, 4, -1, ...

Back

r = -1/4

Front

Find the next three terms: 4, 12, 36, 108, ...

Back

324, 972, 2916

Front

Find the next three terms: -4, -12, -36, -108, ...

Back

-324, -972, -2916

Front

Which formula is used to find the explicit equation for geometric sequences? Options: a_n = a_n-1 + d, a_n = a_n-1 * r, a_n = a₁ + d(n-1), a_n = a₁ * r^n-1

Back

a_n = a₁ * r^n-1

Front

Find the general rule for: 64, -32, 16, -8, … Options: 64(1/2)^n-1, (-32)^n-1, 64(-1/2)^n-1, (32)^n-1

Back

64(-1/2)^n-1

Front

Explicit rule for the general term of the sequence 5, 15, 45, . . . ?

Back

a_n = 5(3)^n-1

Front

Find the 11^th term for: 64, -32, 16, -8, …

Back

-.0625