Let a, b, c, d, e and f, be six distinct positive real numbers.
a : b = c : d = e : f = 2 : 3
=== 3a = 2b ......(i)
3c = 2d ......(ii)
3e = 2f ......(iii)
Let a = 4 from (i) b = 6
Let c = 8 from (ii) d = 12
Let e = 16 from (iii) f = 24
The given expression
= ===So, by replacing the values of a, b, c, d, e, f in the given option
The expression below is not equal to