lblodgett08
lblodgett08 lblodgett08
  • 24-11-2020
  • Mathematics
contestada

What is the value of the 11th term in the sequence -3, -6, -12, -24, ...?

A. -6,144
B. -118,098
C. -3,072
D. -354,294

Respuesta :

jimrgrant1 jimrgrant1
  • 24-11-2020

Answer:

C

Step-by-step explanation:

There is a common ratio r between consecutive terms in the sequence, that is

- 6 ÷ - 3 = - 12 ÷ - 6 = - 24 ÷ - 12 = 2

This indicates the sequence is geometric with n th term

[tex]a_{n}[/tex] = a₁ [tex]r^{n-1}[/tex]

where a₁ is the first term and r the common ratio

Here a₁ = - 3 and r = 2 , thus

a₁₁ = - 3 × [tex]2^{10}[/tex] = - 3 × 1024 = - 3072 → C

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