1. In the sequence an= 5n-7, what is the 13th term? 2, What is the 23rd term of the sequence an = 8n + 5? 3. In the sequence an = 2n2-3, what is the positive difference between a, and a16? 4. In the sequence an = 23-5n, how many terms are positive? 5. Which is greater, the 16th term of an = 7-3n or the 19th term of an = 8n - 5? 6. Which is lesser, the 14th term of an = 9n + 4 or the 11th term of an = n²-5² 7. In the sequence an = 7n-5, what is 3a7-9a9? 8. In the sequence an = 2n² + 1, what is 408 + 5a3? 9. Find the 8th term of. the sequence an = √n³+2 3n-1 10: Find the 7th term of the sequence an = 2n-10 n² +5.​