Q. 2:Let A be a real number. Then the roots of the equation x^2 − 4x – log(base2)A = 0 are real and distinct if and only if?
1. A < 1/16
2. A > 1/8
3. A > 1/16
4. A < 1/8
As we know for Real and distinct roots , discriminant > 0
(-4)^2 – 4*1*(– log2A ) > 0
16+4log2A> 0
So, A > 2^-4
A > 1/16
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