Let U ⊆ R^n be open (not necessarily bounded), let f, g : U → R
be continuous, and suppose that |f(x)| ≤ g(x) for all x ∈ U. Show
that if
exists, then so does
.
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Let T : C([0, 1]) → R be a (not necessarily bounded) linear
functional.
Show that T is positive if and only if
=
(here 1 denotes the constant function [0, 1] → R, x → 1).
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Suppose
is a bounded function for which there exists a partition
such that
. Prove:
is a constant function
f : a, b] →R We were unable to transcribe this imageL(P, f,a) = U(P, f,a) We were unable to transcribe this image
Let a, b ∈ R with a < b. Let f : [a, b] → [a, b] be
continuous. Then there exists at least one ∈ [a, b] such that
.
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Let ⊂
be a
rectangle and let f be a function which is integrable on R. Prove
that the graph of f, G(f) := {(x, f(x)) ∈
: x ∈ }, is a
Jordan region and that it has volume 0 (as a subset of
).
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Let f,g be continuous functions on [a,b] with for all (a) show that there are such that (b) using (a) prove that there is a strictly between x1 and x2 such that f(x) 0 rE a, b a, 1 ( f(xgf(x) < g[x2}f{x)) We were unable to transcribe this imagef(r)g()da g(e) f(x)da f(x) 0 rE a, b a, 1 ( f(xgf(x)
Let E be the solid bounded by the planes , , , , . Set up all six orders of integration for the evaluation of as an iterated integral. We were unable to transcribe this imageWe were unable to transcribe this imagey=0 We were unable to transcribe this imageWe were unable to transcribe this imagef(x, y, 2)d
Let U be an open subset of R. Let f: U C Rn → Rm. (a) Prove that f is continuously differentiable if and only if for each a є U, for each E > 0, there exists δ > 0 such that for each x E U, if IIx-all < δ, then llDf(x)-Df(a) ll < ε. (b) Let m n. Prove that if f is continuously differentiable, a E U, and Df (a) is invertible, then there exists δ...
Let n,
and let
n
be a reduced residue. Let r = odd().
Prove that if r = st for positive integers s and t, then
old(t)
= s.
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3. Let f, g : [a,b] → R be functions such that f is integrable, g is continuous, and g(x) >0 for all r E [a, b] Since both f,g are bounded, let K >0 be such that lf(z)| K and g(x) K for all x E [a3] (a) Let n > 0 be given. Prove that there is a partition P of [a, b such that U (P. f) _ L(P./) < η and Mi(P4)-mi(P4) < η for all...
*4, Let U be an open subset of R" and f:U-R" a function whose component functions have continuous partial derivatives. We say that f is an immersion if Dsf is injective for all v in U and a submersion if Dof is surjective for allv in U. (a) Suppose that f:U-R" is an immersion. Prove that, for each v in U, we can find an open set V of U containing v, an open set W of R" containing f...