We may know that the numerator (m – n) is positive ?

2) Does exercise 2 relevant to questions exactly similar to it, wiht number line shown, or we can draw a line to help us solve many of those crazy inequalities and absolute values ? Please, provide example.

When you multiply both sides by (M + N) to then get -n 1, which is impossible. But even so, (1) tells you that n<-2, so n=0 is not an option regardless.

In the problem, m!=n , (m-n)/(m+n) > 1 ?

1) n 1

My doubt is - why can't it be A). After simplifying the question, we get -n < n. So i plug in different values for n.
( -3, 0, 3) So the values -3 and 0 violates the equation
( -n < n). And only the +ve value i.e +3 satifies (-n 1 , there is no variable in the equation (-n < n). So we can eliminate B,C,D,E

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1)n1

My doubt is - why can't it be A). After simplifying the question, we get -n< n. So i plug in different values for n.
( -3, 0, 3) So the values -3 and 0 violates the equation( -n < n). And only the +ve value i.e +3 satifies (-n 1 , there is no variable in the equation (-n < n). So we can eliminate B,C,D,E

D represents the exact range, and does not include anything not in the range.

Keep an eye out for phrases like "most accurately" in the stimulus.

Thanks.