Exercise 46 Page 279

We want to find certain terms of an arithmetic sequence described by its explicit formula. A(n)=5+(n-1)(-3)For the given explicit formula, we can find the second, fourth, and eleventh terms of the sequence by substituting 2, 4, and 11 into the formula for n. Let's start with the second term.

Now, let's do the same thing for the fourth and eleventh terms.

The second, fourth, and eleventh terms are 2, - 4, and - 25, respectively.