f is monotonically increasing function defined on (a,b) then f(x+) and f(x-) exists at every point x of (a,b) and sup...
f(x+) and f(x-) exists at every point x of (a,b) and sup f(t) =f(x-)is less than equal to f(x)is less than equal to f(x+)=inf f(t) | Limit and Continuity | Real Analysis
read more