8.2E: Sequences and Their Notations (Exercises) Last updated Feb 8, 2022 Save as PDF 8.2: Sequences and Their Notations 8.3: Arithmetic Sequences Page ID96352 OpenStaxOpenStax ( \newcommand{\kernel}{\mathrm{null}\,}\) 1. Write the first four terms of the sequence defined by the recursive formula a1=2,an=an−1+n. 2. Evaluate 6!(5−3)!3!. 3. Write the first four terms of the sequence defined by the explicit formula an=10n+3. 4. Write the first four terms of the sequence defined by the explicit formula an=n!n(n+1)