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Jack
10-10-2013, 12:11 PM
If a>0, ab<0, and abc<0 , then which of the following could NOT be negative?


(A) abc^2

(B) ab^2c^3

(C) a^3 bc^3

(D) a^3 b

Thanks

miranda
10-10-2013, 12:12 PM
From the given inequalities we deduce that a>0, b<0, \ and\ c>0 and the only NOT negative i.e. positive expression is ab^2c^3

Therefore the correct answer is (B).

Jack
10-10-2013, 12:12 PM
Thanks miranda!