NDA 2021 Mathematics question
The quadratic equation
-+5k)x+-5k=0
has real roots of equal magnitude and opposite sign. Which one of the following is correct?
Answer: (D)
Solution
Roots of equal magnitude and opposite sign are and (, real). So (i) sum of roots and (ii) product of roots . (i) or . (ii) $<0⇒ k(3k-5)<0⇒
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