Write the first four terms of each sequence whose general term is given. a_n=3n+2

Write the first four terms of each sequence whose general term is given. a_n = 7n - 4

Write the first four terms of each sequence whose general term is given. a_n=3ⁿ

Write the first four terms of each sequence whose general term is given. a_n=(−3)ⁿ

Evaluate $\frac{40!}{4!38!}$

Write the first four terms of each sequence whose general term is given. a_n=(−1)ⁿ(n+3)

In Exercises 8–9, find each indicated sum. This is a summation, refer to the textbook.