1) > 1
2) < 1
3) > 6
4) < 6
Solution: (3) > 6
Since AM > GM
[(a / b) + (b / a)] / 2 > √(a / b) (b / a) = 1
(a / b) + (b / a) > 2
Similarly (b / c) + (c / b) > 2
On adding, (a / b) + (b / a) + (b / c) + (c / b) + (c / a) + (a / c) > 6
[(b / a) + (c / a)] + [(c / b) + (a / b)] + [(a / c) + (b / c)] > 6
[b + c] / a + [c + a] / b + [a + b] / c > 6