math 10 Geometric Sequence

8, 16, 32, ...

• 40
• 64
• 24
• 48

10, 20, 40, ...

• 30
• 50
• 80
• 60

5, 15, 45, ...

• 225
• 300
• 135
• 90

5, 25, 125, ...

• 225
• 625
• 325
• 425

What is geometric sequence?

• A geometric sequence is a sequence of numbers where each term is found by subtracting the previous term by a fixed number called the common ratio.
• A geometric sequence is a sequence of numbers where each term is found by dividing the previous term by a fixed number called the common ratio.
• A geometric sequence is a sequence of numbers where each term is found by adding the previous term by a fixed number called the common ratio.
• A geometric sequence is a sequence of numbers where each term after the first is found by multiplying the previous term by a fixed, non-zero number called the common ratio.

8, 64, 512, ...

• 134217728
• 1024
• 4096
• 16384

Find term number 8 of the sequence: 1, 4, 16, ...

• 128
• 32
• 256
• 64

Find term number 10 of the sequence: 5, 15, 45, ...

• 135
• 75
• 60
• 225

Find the first 5 terms of this sequence:

u_n=3×2ⁿ⁻¹

• 5, 10, 15, 20, 25
• The first 5 terms of the sequence are 3, 6, 12, 24, 48
• 2, 4, 8, 16, 32
• 3, 9, 18, 36, 72

Find the first 4 terms of this sequence:

u_n=(−7)×4ⁿ⁻¹

• -7, -28, -112, -450
• -7, -28, -112, -500
• -7, -28, -112, -448
• -7, -28, -112, -400