Math miscellaneousMedium
Question
Let |a| < |b| and a, b are the roots of the equation x2 - |α|x-|β|=0. If|α| < b - 1 then the equation log|a|
- 1 = 0
Options
A.At least one root lying between (- ∞, a)
B.at least one root lying between (b, ∞)
C.has a negative root
D.has a positive root
Solution
|α| = a + b
- (β) = ab
Hence, a is negative b is positive
Now |α| < b - 1
⇒ a < - 1
- (β) = ab
Hence, a is negative b is positive
Now |α| < b - 1
⇒ a < - 1
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