 Hi, and welcome to the session. Let's just ask the following question. The question says, find the indicated terms in each of the sequences. In exercises 7 to 10, whose n-th terms are, 9 part is, a n is equal to minus 1 to the power n minus 1 into n cubed, and we have to find a 9. Let's now begin with the solution. The given n-th term is a n is equal to minus 1 to the power n minus 1 into n to the power 3. Since we need to find a 9, therefore we will put n as 9 in the n-th term. By substituting n as 9 in the n-th term, we get a 9 is equal to minus 1 to the power 9 minus 1 into 9 to the power 3, and this is equal to minus 1 to the power a into 9 to the power 3 is equal to 729 minus 1 to the power 8 as 1. So we have 1 into 729, and 1 into 729 is equal to 729. Hence, a 9 is equal to 729. This is our required answer. So this completes the session. Bye and take care.