Summation Notation and Arithmetic Sequences Precalculus Homework

1. Write the sum using summation notation, assuming the suggested pattern continues. 1 - 3 + 9 - 27 + ... (2 points) 2. Write the sum using summation notation, assuming the suggested pattern continues. -9 - 4 + 1 + 6 + ... + 66 (2 points) 3. Write the sum using summation notation, assuming the suggested pattern continues. 16 + 25 + 36 + 49 + ... + n2 + ... (2 points) 4. Find the sum of the arithmetic sequence. -10, -7, -4, -1, 2, 5, 8 (1 point) 11 -70 0 -7 5. Find the sum of the geometric sequence. (1 point) 1, 93 6. Find the sum of the first 8 terms of the sequence. Show all work for full credit. 1, -3, -7, -11, ... (2 points)