Difference between revisions of "Squeeze Theorem"
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− | The '''Squeeze Play Theorem'''(or the '''Sandwich Theorem''') is a relatively simple [[theorem]] that deals with [[calculus]], specifically [[limit]]s. | + | The '''Squeeze Play Theorem''' (or the '''Sandwich Theorem''') is a relatively simple [[theorem]] that deals with [[calculus]], specifically [[limit]]s. |
==Theorem== | ==Theorem== |
Revision as of 19:42, 1 December 2007
The Squeeze Play Theorem (or the Sandwich Theorem) is a relatively simple theorem that deals with calculus, specifically limits.
Theorem
Suppose is between
and
for all
in the neighborhood of
. If
and
approach some common limit L as
approaches
, then
.
Proof
If is between
and
for all
in the neighborhood of
, then either
or
for all
in the neighborhood of
. The second case is basically the first case, so we just need to prove the first case.
If increases to
, then
goes to either
or
, where
. If
decreases to
, then
goes to either
or
, where
. Since
can't go to
or
, then
must go to
. Therefore,
.