Sequences Quiz

1. What is the term-to-term rule for the sequence $6, 10, 14, 18, \dots$?

• A. Add 4 to the previous term
• B. Multiply the previous term by 4
• C. Add 6 to the previous term
• D. Subtract 4 from the previous term

2. What is the nth term of the sequence $5, 8, 11, 14, \dots$?

• A. $3n+2$
• B. $3n-2$
• C. $2n+3$
• D. $5n+3$

3. What is the nth term of the triangular numbers?

• A. $\dfrac{n(n+1)}{2}$
• B. $n^2$
• C. $n(n-1)$
• D. $\dfrac{n(n-1)}{2}$

4. A geometric progression begins $4, 12, 36, 108, \dots$. What is its nth term?

• A. $4(3)^{n-1}$
• B. $4(3)^n$
• C. $12(3)^{n-1}$
• D. $4n^3$

5. A quadratic sequence has terms $2, 6, 12, 20, 30$. What is its nth term?

• A. $n^2+n$
• B. $n^2+2n$
• C. $2n^2$
• D. $n^2-n$