Name: SAT Math Help & School Math Mastery
Availability: InStock

SATify

Home Practice Exams Features Pricing Quick Start Guide About

Login Sign Up

Loading...

SAT Math Practice Question #14344 - SATify | SATify

#14344

counting

sequences and series

exponential

hard

75 sec

A sequence starts with 12. Every subsequent term is twice the preceding term. If $a_{n}$ is the $n$ th term of the sequence, which equation expresses $a_{n}$ in terms of $n$ ?

A.

$a_{n} = 2 (1 2^{n - 1})$

B.

$a_{n} = 12 (2^{n})$

C.

$a_{n} = 2 (1 2^{n})$

D.

$a_{n} = 12 (2^{n - 1})$