An arithmetic series has 6th term -13 and 18th term -49. Find the 2nd term.

An arithmetic series has 19th term -11 and 7th term 7. Find the 10th term in decimal form.

An arithmetic series has 13th term 9 and 25th term 12. Find the sum of the first 9 terms.

The sum of the first 8 terms of an arithmetic series is 0 and the 4th term is 1. Find the sum of the first 10 terms.

The sum of the first 12 terms of an arithmetic series is 90 and the 23rd term is 90. Find the 7th term.

The sum of the first 20 terms of an arithmetic series is -50. Find the sum of the first term and the 20th term.

A geometric series has 3rd term 18 and 6th term -486. Find the 2nd term.

A geometric series has 9th term 1 and 4th term 32. Find the 3rd term.

The sum of the first 3 terms of a geometric series is 183 and the 3rd term is 48. The common ratio is positive. Find the sum to infinity.

The sum to infinity of a geometric series is 36. The sum of the first 2 terms is 20. The common ratio is positive. Find the first term.

A geometric series has 5th term 1296 and 2nd term 750. Find the sum of the first 4 terms.