1.2 Arithmetic sequences and series Quiz

1. An arithmetic sequence is $5,9,13,\ldots$. Find $u_{15}$.

• A. $57$
• B. $65$
• C. $61$
• D. $67$

2. Find the sum of the first 10 terms of $3,7,11,\ldots$.

• A. $210$
• B. $420$
• C. $195$
• D. $39$

3. Evaluate $\sum_{k=1}^{12}(3k+2)$.

• A. $234$
• B. $516$
• C. $246$
• D. $258$

4. 2500 EUR is invested at 4% simple interest per year. What is its value after 6 years?

• A. $3000$ EUR
• B. $3100$ EUR
• C. $3163.30$ EUR
• D. $2600$ EUR

5. An arithmetic sequence has $u_4=17$ and $u_9=42$. Find $d$.

• A. $5$
• B. $4$
• C. $3$
• D. $8$