its better testing with some smart numbers.obviously will take some seconds more but worth it.
As per this question there can be four cases:
1 )+ +
2)+ -
3)- +
4)- -. Check for the validity and you will see that choices 2 and 3 only suffice.So the product is going to be <0 with either case.Hence E
Answer which you 'll derive using smart numbers will be beyond doubt and perfect.Get used to smart numbers in areas like absolute values,percentages,ratios.They help a lot![:)]( "Smile")
)
As per this question there can be four cases:
1 )+ +
2)+ -
3)- +
4)- -. Check for the validity and you will see that choices 2 and 3 only suffice.So the product is going to be <0 with either case.Hence E
Answer which you 'll derive using smart numbers will be beyond doubt and perfect.Get used to smart numbers in areas like absolute values,percentages,ratios.They help a lot
)