JEE Main 2019 Mathematics question
The number of integral values of m for which the quadratic expression, , x ∈ R, is always positive, is:
Answer: (A)
Solution
1 + 2m > 0 and D < 0 ⇒ ⇒ m = 0, 1, …, 6.
The number of integral values of m for which the quadratic expression, , x ∈ R, is always positive, is:
1 + 2m > 0 and D < 0 ⇒ ⇒ m = 0, 1, …, 6.