A. (1, 2)
B. [1,2]
C. (-∞, 1) U (2, ∞)
D. (-∞, 1] U [2, ∞)
The range of x2+4y2+9z2-6yz-3xz-2xy is
The domain of √(x-1)(x-2)(x-3) is
The domain of f(x)= log10(√x-4 +√6-x) is
The domain of √1-3x+Cos-1 3x-1/2 is
f={(1, 4), (2,-2), (3,10)} then f/2=