Arithmetic and Geometric Nth Term

which of the following is a geometric sequence?

• −1, 6, −36, 216, ...

• −2, −4, −8, −16, ...

• 2, 4, 6, 8, ...

• 4 , 8 , -16 , 32

Write the first term(a1) and the common ratio(r) of this geometric sequence 1/11 , 3/22 , 9/44 , 27/88, 81/176, ...?

• 1/2

• 1/4

• 3/2

• 5/4

what is the first term of this geometric sequence ____, 510, 3060, 18360, 110160, ...

• 255

• 85

• 105

• 25

The second and Fifth terms of a geometric series are 750 and -6 respectively , find the first term (a₁)?

• 3750

• -3750

• 2750

• -2750

wha is the next term of the geometric sequence 5 , -15 , 45, -135 , 405,...?

• 1215

• -1215

• 2115

• -2115

Which of the following is an arithmetic sequence?

• 2,3,5,8

• 2,7,12,17

• 1,1,2,3,5

• 2,4,8,16

Which of the following is not an arithmetic sequence.

• 1,2,3,4,5

• 3,9,27,81

• 4.5 , 5.0 , 5.5 , 6.0,...

• 13, 2, -9 , -20, -31

The second and third term of a geometric sequence is 192 and 144 respectively , what is the common ratio?

• 1/4

• 1/2

• 3/4

• 1

Is this sequence arithmetic, geometric, or neither?

-7, 93, 193, 293, 393, ...

• arithmetic

• geometric

• neither

Is this sequence arithmetic, geometric, or neither?

2.5, 5, 10, 20, 40 ...

• arithmetic

• geometric

• neither