E term of a sequence is given by 2.1 + 1. Write down the first four terms of the sequence. first four terms of another sequence are 1, 7, 17, 31.
comparing this sequence with the sequence in (a), write down, in terms of n, a formula for the n"
jerm of the sequence.
Hence, find the 388 term.

Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.