Trying ot figure out is there is the solution with plug in numbers, but obviously not.
If K not zero, 1 or -1. is 1/K>0?
1. 1/k-1>0
2.1/k+1>0
My answer was that each answer worked. GMAT's is only the first answer is correct.
Little help here please?
If K not zero, 1 or -1. is 1/K>0?
1. 1/k-1>0
2.1/k+1>0
My answer was that each answer worked. GMAT's is only the first answer is correct.
Little help here please?
