•Sandwich rule⪢⪢
Let f, g and h be three functions satisfying f(x)≤g(x)≤h(x) in some detected neighborhood of x=a.
If ⎾f(x)⏐x￫a⏌=⎾h(x)⏐x￫a⏌= L then ⎾g(x)⏐x￫a⏌= L.
http://qindex.info/i.php?x=5218
•Sandwich rule⪢⪢
Let f, g and h be functions such that f(x)≤g(x)≤h(x) for all x in some neighborhood of c and such that f(c)=g(c)=h(c).
If f and h are conyinuous at c, then so is g.
http://qindex.info/i.php?x=6899
○○○5.2.5 Sandwich rule⪢⪢
Let f, g and h be functions such that f(x)≤g(x)≤h(x) for all x in some neighborhood of c and such that f(c)=g(c)=h(c).
If f and h are conyinuous at c, then so is g.
http://qindex.info/i.php?x=5160
