If A={x:x is positive and x < 0} then n(A) is
0
1
2
3
Given,
A={x:x is positive and x < 0}
Since all the positive numbers are greater than 0, there is no value which satisfies the given condition.
⇒ Set A is an empty set
⇒n(A)=0
If 5x6 is exactly divisible by 3, then the least value of x is
(a) 0
(b) 1
(c) 2
(d) 3
If A = [x110] and A2 = I , then x =