3 Multiple Choice 10 points Which sequence is a geometric sequence with a common ratio of 2 ? \( \begin{array}{l}5,15,45,135, \ldots \\ 5,10,20,40, \ldots \\ 5,3,1,-1, \ldots \\ 5,7,9,11, \ldots\end{array} \)

The correct answer is: \(5,10,20,40,\ldots\). This sequence is a geometric sequence because each term is obtained by multiplying the previous term by a common ratio of 2. So, \(5 \times 2 = 10\), \(10 \times 2 = 20\), \(20 \times 2 = 40\), and so forth. If you're eager to learn more about geometric sequences, remember that they can be found in finance (like compound interest), nature (like population growth), and even digital technology (like computing powers). It's a fascinating concept that connects math to real-world phenomena!