Then the inequality [f (x)-f (-x)]/x
That is 2f (x)/x)/x.
That is f (x)/x)/x.
When x>0, f(x) is increasing function, and f(2)=0.
When 0
f(x)/x & lt; 0, the inequality holds.
When x>2 is at o'clock, f(x)>f(2)=0.
f(x)/x & gt; 0, the original inequality does not hold.
According to odd function's symmetry about the origin.
When-2 < x <; 0,f(x)>0,
f(x)/x & lt; 0, the original inequality holds.
When x
f(x)/x & gt; 0, the original inequality does not hold.
To sum up, the solution set of inequality is
(-2,0)U(0,2)
The combined image is clearer.