Geometric Sequence: Testing Question

A f (n) = 3n−1 B

A f (n) = 3n−1 n−1 f (n) = 4 B

A f (n) = 3n−1 n−1 f (n) = 4 B

C f (n) = 3(4n−1 )

A f (n) = 3n−1

n−1 f (n) = 3(4 ) C

B f (n) = 4

n−1 f (n) = 4(3 ) D

n−1

A f (n) = 3n−1 B f (n) = 4n−1 C f (n) = 3(4n−1 ) D f (n) = 4(3n−1 )

A f (n) = 3

n−1

This is a geometric sequence

Common ratio

B f (n) = 4n−1 C f (n) = 3(4n−1 ) D f (n) = 4(3n−1 )

A f (n) = 3

n−1

This is a geometric sequence

Common ratio a2 a1

B f (n) = 4n−1 C f (n) = 3(4n−1 ) D f (n) = 4(3n−1 )

A f (n) = 3

n−1

This is a geometric sequence

Common ratio a2 12 a1 = 4

B f (n) = 4n−1 C f (n) = 3(4n−1 ) D f (n) = 4(3n−1 )

A f (n) = 3

n−1

This is a geometric sequence

Common ratio 12 4

B f (n) = 4n−1 C f (n) = 3(4n−1 ) D f (n) = 4(3n−1 )

A f (n) = 3

n−1

This is a geometric sequence

Common ratio 12 4 =3

B f (n) = 4n−1 C f (n) = 3(4n−1 ) D f (n) = 4(3n−1 )

A f (n) = 3

n−1

This is a geometric sequence

Common ratio 12 4 =3

B f (n) = 4n−1 C f (n) = 3(4n−1 ) D f (n) = 4(3n−1 )

A f (n) = 3

n−1

This is a geometric sequence

Common ratio 12 4 =3

f (n) = 3n−1

B f (n) = 4n−1 C f (n) = 3(4n−1 ) D f (n) = 4(3n−1 )

A f (n) = 3

n−1

This is a geometric sequence

Common ratio 12 4 =3

f (1) = 31−1 f (n) = 3n−1

B f (n) = 4n−1 C f (n) = 3(4n−1 ) D f (n) = 4(3n−1 )

A f (n) = 3

n−1

This is a geometric sequence

Common ratio

C f (n) = 3(4n−1 )

12 4 =3

f (1) = 31−1

B f (n) = 4n−1

D f (n) = 4(3n−1 )

f (1) = 30

A f (n) = 3

n−1

This is a geometric sequence

Common ratio

C f (n) = 3(4n−1 )

12 4 =3

f (1) = 30

B f (n) = 4n−1

D f (n) = 4(3n−1 )

f (1) = 1

A f (n) = 3

n−1

This is a geometric sequence

Common ratio 12 4 =3

f (1) = 30 f (1) = 1

False

B f (n) = 4n−1 C f (n) = 3(4n−1 ) D f (n) = 4(3n−1 )

A f (n) = 3

n−1

This is a geometric sequence

Common ratio 12 4 =3

f (n) = 30 f (1) = 1

B f (n) = 4n−1 C f (n) = 3(4n−1 ) D f (n) = 4(3n−1 )

f (1) = 4

False

This is a geometric sequence

Common ratio 12 4 =3

f (1) = 30 f (1) = 1

D f (n) = 4(3n−1 )

f (1) = 4

False

This is a geometric sequence

Df (n) = 4(3n−1 )

This is a geometric sequence

D f (n) = 4(3n−1 ) ←

Answer

This is a geometric sequence

f (n) = 4(3n−1 ) f (1) = 4(31−1 )

This is a geometric sequence

f (1) = 4(31−1 ) f (1) = 4(30 )

This is a geometric sequence

f (1) = 4(30 ) f (1) = 4

This is a geometric sequence

f (1) = 4

This is a geometric sequence

f (2) = 4(32−1 ) f (2) = 12

This is a geometric sequence

f (3) = 4(33−1 ) f (3) = 36

This is a geometric sequence

f (4) = 4(34−1 ) f (4) = 108

This is a geometric sequence

f (5) = 4(35−1 ) f (5) = 324

This is a geometric sequence

f (5) = 4(35−1 ) f (5) = 324

f (n) = 4(3n−1 )