If ab≠0, is \frac{[ ( a - b )}{( a^{-1} - b^{-1})]}^{-1}> (a+b)
(1) |a| > |b|
(2) a < b
What is the answer and fast way to solve ?![]()
(1) |a| > |b|
(2) a < b
What is the answer and fast way to solve ?