Math wk 5

What is the nth of Geometric Sequence?

• a_n = a_1 + r^(n-1)
• a_n = a_1 / r^(n-1)
• a_n = a_1 * r^(n-1)
• a_n = r * n

What is the common ratio of 2,4,8,16?

• 3
• 2
• 4
• 5

What is the sum of the first 5 terms of the geometric sequence 3, 6, 12, 24, ...?

• 63

• 60

• 57

• 54

If the first term of a geometric sequence is 5 and the common ratio is 3, what is the 4th term?

• 135

• 120

• 100

• 90

Which of the following sequences is a geometric sequence?

• 1, 2, 4, 8

• 2, 3, 5, 7

• 1, 3, 6, 10

• 5, 10, 20, 40

Write the first four terms of the Geometric Sequence? r=-4, a₁ = 1/3

• 1/3, -5/3, 25/3, -125/3
• [1/3, -4/3, 16/3, -64/3]
• 1/3, -2/3, 4/3, -8/3
• 1/3, -1/3, 1/3, -1/3

How many number of terms in, 3,9,27,81,243?

• 5
• 4
• 6
• 10

Find the number of terms in 4,1,1/4,...,1/1024?

• 7
• 5
• 3
• 10

What is the common ratio of the geometric sequence 5, 15, 45, 135?

• 3

• 2

• 5

• 4

How many terms are in the geometric sequence 1, 1/2, 1/4, ..., 1/1024?

• 10

• 11

• 12

• 9