himu wrote:Is x a real number?
Sqrt X is not positive
x^2 is not positive
Statement 1: By definition, if x is a nonnegative real number then √x is always nonnegative. As √x is not positive, then we can only conclude that x is not a positive real number. But x can be either equal to zero or a negative real number or not real at all.
Not sufficient
Statement 2: As square of any real number is always nonnegative, x is either equal to zero or not real at all.
Not sufficient
1 & 2 Together: x is either equal to zero or not real at all.
Not sufficient
The correct answer is E.
