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lenagmat
- Senior | Next Rank: 100 Posts
- Posts: 45
- Joined: Sun Oct 16, 2011 2:21 pm
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If -2<a<11 and 3<b<12, then which of the folloing is NOT true?
A). 1<a+b<23
B). -14<a-b<8
C). -7<b-a<14
D). 1<b+a<23
E). -24<ab<132
Answer is C. and for me the only question here is what to do with E. to be true, because for me it is not true the same like C.
A). 1<a+b<23
B). -14<a-b<8
C). -7<b-a<14
D). 1<b+a<23
E). -24<ab<132
Answer is C. and for me the only question here is what to do with E. to be true, because for me it is not true the same like C.
