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Source: — Data Sufficiency |
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by akshatsingh » Tue May 13, 2008 9:46 pm
1) Insufficient. Put w = -1 and 1.
2) w^2>1 means w can assume a negative and a positive value as well. Insufficient

1) and 2) together also aree unable to tell the sign of w

Answer seems E to me.
Aks
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