If , then which one of the following is negative?
(I)
(II)
(III)
(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only
Thanks
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If , then which one of the following is negative?
(I)
(II)
(III)
(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only
Thanks
All of the choices can be interpreted as quadratic inequalities with roots . The leading coefficient(s) for (I) and (III) are positive while for (II) is negative.
Therefore, for (I) and (III) we have the following sign diagram
---(+)--------{-4}---------(-)-------------{1}-------(+)---------
While for (II) we have the following sign diagram
---(-)--------{-4}---------(+)-------------{1}-------(-)---------
Therefore the correct answer is (E).
Hope these help!!
Thanks a lot for your reply!!;)