xcercise 0 The fourth term of an arithmetic progression is 7 and the tenth term is 16. Find the frst term and the common difference. 9 In an arithmetic progression, the 1St term is 12. the 17'th term is 12 and the last term is 45. Find the sum of all the terms in the progression 9 The 10th term in an arithmetic progression is 14 and the sum of the frst 7 terms is 42. Find the frst term of the progression and the common difference. 0 The ffth term of a geometric progression is 1 and the common ratio is 1 E . Find the eighth term and an expression for the nth term. 0 The second and fifth terms in a geometric progression are 12 and 40.5. respectively. Find the frst term and the common ratio. Hence. write down an expression for the nth term. 0 The third term of a geometric progression is nine times the frst term. The sum of the frst six terms is k times the sum of the frst two terms. Find the value of k