Sequences Rules

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

• r = -4

• r = 2

• r = -2

• r = 4

A formula that requires finding all previous terms to find the value of a_n.

• Explicit Formula

• Recursive Formula

• Arithmetic Formula

• Geometric Formula

This image shows how a certain bacteria grows in a petri dish. What is the common ratio of this sequence?

• 4

• 3

• 2

• 6

• the final term in the sequence

• first term

• Nth term, where n>1

• previous term

• -5, -2, 1, 4

• -5, -8, -11, -14

• 3, -2, -7, -12

• 3, -15, 75, -375

• -6, -12, -18, -24

• 100, 94, 88, 82

• answer not here

• 100, 106, 112, 118

• 5.5, 6, 6.5, 7

• 5.5, 2.75, 1.375, 0.6875

• -0.5, 5, 10.5, 16

• 5.5, 5, 4.5, 4

Given the sequence -5, -15, -25, -35..., which recursive formula describes it?

Given the sequence 11, 15, 19, 23..., which recursive formula describes it?

Given the sequence 30, 40, 50, 60..., which recursive formula describes it?