Bunuel wrote:
ziko wrote:
i also have chosen B, but then thought what if k=0, we don't know from the statements, so then answer should be E.
Did i miss anything?
Notice that if k=0 then k^2/m=0 and the answer to the question whether k^2/m<0 is still no.
Hope it's clear.
No the answer to this one could be C.
The stem asks is k^2/m<0
or u can write :
Is k^2*m < 0 ??
now u will wonder k^2 will always be positive.so it depends on m only whether the product is <0 or not.
But it is not the case.
As k could be an imaginary number say k = (-1)^0.5 or 'iota' as we call it, for which it fails.Since it is not mentioned here that k is a real number we cant guess on the nature on k. Thus we also need to determine the nature of k(real or imaginary).
And hence answer is C.
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