Geometric Sequence

What is the correct formula of geometric sequence?

• a_n = a _rⁿ-1

• a_n = a₁ rⁿ-1

• a_n = a₁ rⁿ-1

• a_n = a₁ r^n-1

what is the correct meaning of a_n in geometric sequence?

• number of terms

• last term

• first term

• common ratio

What is the next term of 2, 4, 8, 16 _

• 30

• 32

• 34

• 36

What is the common ratio in the geometric sequence 3, 6, 12, 24?

• 1

• 2

• 3

• 4

How do you find the nth term of a geometric sequence?

• Multiply the first term by the common ratio raised to the power of n-1

• Add the first term to the common ratio

• Subtract the common ratio from the first term

• Divide the first term by the common ratio

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

• 45

• 135

• 405

• 15