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. $a_n=1/(n-1)!$

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

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.

Write the first four terms of each sequence whose general term is given. a_n=2n/(n+4)

In Exercises 10–11, express each sum using summation notation. Use i for the index of summation. 1/3 + 2/4 + 3/5 + ... + 15/17