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st 1 says 1/(k-1)>0 that means k-1>0 that means k>1 that means k is +ve and thus 1/k>0 ... suff

st2 says 1/(k+1) >0 that means k+1>0 i.e k>-1 that means k can -ve fraction or k is positive . if k is -neg fraction 1/k <0 and if k is +ve 1/k >0 so insuff

Hi Guys,
The OA is A. Can anybody explain how did thi answer come??

As per the solutions given by folks since one says 1/(k-1) >0 it implies k-1 <0 or k<1 therefore K maybe greater that 0 0r less than 0. SO how come the correct answer is A in GMAT PREP.

Hi Guys, The OA is A. Can anybody explain how did thi answer come??

As per the solutions given by folks since one says 1/(k-1) >0 it implies k-1 <0 or k<1 therefore K maybe greater that 0 0r less than 0. SO how come the correct answer is A in GMAT PREP.

fig is this right or wrong why we did it your way?? eg: 1/x< 5 thus x>1/5

but if

1/x <0 we cant say x>1/0 because it is not defined ......right or wrong

Yes don't use the flip sign method when you have zero on the right side. In stead, think this way. For a product or ratio of two numbers to be positive, the two numbers have to have the same sign; for the product or ratio to be negative, the two numbers must have different signs. _________________

Keep on asking, and it will be given you;
keep on seeking, and you will find;
keep on knocking, and it will be opened to you.

I´ve done an interview at Accepted.com quite a while ago and if any of you are interested, here is the link . I´m through my preparation of my second...

It’s here. Internship season. The key is on searching and applying for the jobs that you feel confident working on, not doing something out of pressure. Rotman has...