LCD(9, 36) = 36.
LCD(12, 9) = 36
LCD(4, 2, 9) = 36
36
LCD(4, 9) = 36.
36
It is 36
36
36
LCD(9, 1, 4) = 36
It is 36 which is also their LCM
If you mean lcm, it is 36 because 9 x 4 equals 36 and 3 x 12 equals 36.
The LCD for the given three numbers is 36