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Acotaciones analisisII - UBA -Exactas
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Machete del acotador frecuente v0.1-1 (2010-05-20)
Desigualdades
|a|+ |b| |a| 1|a|+ |b| 1
|a||a+ b| |a|+ |b|
(x, y) (a, b)2 > (x.y) (a, b)(x a)2 = |x a|2
(x a)3 = |x a|2.(x a)|x| < (x, y)
|x a|(x, y) (a, b) 1|y b|
(x, y) (a, b) 1
| x2
x2 + y2| 1
|ex 1| |x|e|x|ex 1 + xx ln(x)
x
1 + x< ln(1 + x) < x
|x x3
6| |sen(x)| |x| (con x 1)
1 cos(x) x2
xcos(pi x) = cos(x)
sen(2t) = 2sen(t).cos(t)
cos(2t) = cos2(t) sen2(t)|sen(x)| |x||sen(x)| 1|cos(x)| 1
sen2(x) + cos2(x) = 1
Desigualdad de Cauchy Schwarz :|x, y|2 x, x y, y|x, y| x y
Lmites
limt0
sen(t)
t= 1
limt0
t. ln(t) = 0
limt0
t.sen(t) = 0
limt0
et 1 = 0limt0
et = 0
limt(1 +
1
t)t = e
limt
ln(t)
t= 0
cero por acotado = 0
compilado por A.K.