anonymous
  • anonymous
Can anyone tell me where to find a complete note set on using precise limit definition? I understand enough to prove limits using it but not enough to answer questions like this. Let a,L (belongs to) R , and Let f,g,h real value functions. There exist delta such that f(x)<=g(x)<=h(x) for all x belongs to(a-delta, a+delta) if limit f(x) =L = limit h(x) x->a x->a prove that limit g(x)=L x->a
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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zzr0ck3r
  • zzr0ck3r
I would get any advanced calculus book. This stuff is very old so they all say pretty much the same thing. I think a good book is the following: An introduction to analysis by Wade.
zzr0ck3r
  • zzr0ck3r
It is hard stuff and it takes a while to get comfortable
anonymous
  • anonymous
Thanks. Couldn't find a copy on internet though :)

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zzr0ck3r
  • zzr0ck3r
Suppose \(\exists \delta_0 \) s.t. \(|x-a|< \delta \implies f(x)\le g(x) \le h(x)\). Now \(\exists \delta_1>0\) s.t. \(x\in(a-\delta_1, x+\delta_1) \implies |f(x)-L|L-\epsilon \). Similarly \(\exists \delta_2>0\) s.t. \(x\in(a-\delta_2, x+\delta_2) \implies |h(x)-L| 0 \) be given, define \(\delta =\min\{\delta_0,\delta_1, \delta_2\}\) and suppose \(|x-a|<\delta\) then \(L-\epsilon< f(x) \le g(x) \le h(x) < \epsilon+L\)
zzr0ck3r
  • zzr0ck3r
The result follows because we have \(|g(x)-L|<\epsilon\) when \(x\in (a-\delta, a+\delta)\).
anonymous
  • anonymous
Thnx.:) ok

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