INTEGRALES INMEDIATAS (DIRECTAS)
Enviado por acnz2012 • 14 de Septiembre de 2013 • 2.253 Palabras (10 Páginas) • 600 Visitas
INTEGRALES INMEDIATAS (DIRECTAS)
1.- ∫cosx sen^3 xdx
(sen^4 x)/4+c
2.-∫2x eˣ²dx
eˣ²+c
3.-∫x dx/(〖(x〗^2+3)⁵) dx
(-1)/(8〖(x〗^2+3)⁴)+c
4.-∫1/x ln^3 xdx
(ln^4⎸x⎸)/4+ c
5.-∫dx/(x-1)
ln⎸x-1⎸+c
6.-∫(x+√x)/x^2 dx
ln⎸x⎸-2/√x+ c
7.- ∫ 3/(1+x²) dx
3 arc tg x+c
8.-∫dx/(x-4)^2
(-1)/((x-4))+ c
9.-∫dx/(x-4)
ln⎸x-4⎸+c
10.- ∫eˣ^(-4) dx
eˣ-^4+ c
11.- ∫e^(-2) ˣ^(+9) dx
-1/2 e ⁻²ˣ^(+9)+ c
12.- ∫ dx/(x+4)
1/2 arc tg (X/2)+ c
13.-∫4/(3+x^2 ) dx
(4√3)/3 arc tg (x/√3)+ c
14.-∫5/(4x^2+1) dx
5/2 arc tg (2x)+ c
15.-∫2/(1+9x^2 ) dx
2/3 arc tg (3x)+ c
16.-∫dx/(√4-x^2 ) dx
arc sen (x/2)+ c
17.-∫ eˣ/(√1-e^2 ˣ) dx
arc sen (eˣ)+ c
INTEGRALES POR PARTES
∫u.v΄dx=u.v- ∫u΄.vdx
1.- ∫x cos〖x dx〗=x sen x- ∫sen x dx
=x senx+cosx+c
U: x derivar du: 1
V΄: cos x integrar V: sen x
2.- ∫senx [ln(cosx) ]dx= -cosx ln〖(cosx)- ∫senx dx〗
=-cosx ln〖(cosx)+cos〖x+c〗 〗
U: ln(cosx) U΄: senx/cosx
V΄: senx dv: - cosx
3.-∫x-tan〖x dx= -x ln〖cosx+ ∫ln〖cosx dx〗 〗 〗
=-x•ln〖cosx+tan〖x+c〗 〗
U: x du:1
V΄: tanx dv: -ln cos x
4.-∫x ln〖2x=ln〖2x •1/2 x²-∫▒〖1/2 x²;1/x dx〗〗 〗
= 1/2 x² ln〖2x-1/2∫x 1/x dx〗
= 1/2 x² ln〖2x-1/4 x²+c〗
U: ln 2x du: 1/x
V΄: x V:1/2 x²
5.- ∫x^2 ln〖x dx=lnx •2x-∫1/x〗• 2x dx
=2x ln〖x-2 ∫x 1/x dx〗
=2x ln〖x-2x+c〗
U: ln x du:1/x
V: x² V: 2x
6.-∫x^4 lnx dx= ∫lnx x^4 dx
=lnx 1/5 x^5-∫1/x•1/5 x⁵dx
=lnx•1/5 x^5-1/5∫x⁴dx
=lnx•1/5 x^5-1/5 (1/5 x^5 )
=lnx 1/5 x^5-1/25 x^5+ c
U: lnx du:1/x
V΄: x⁴ dv:1/5 x⁵
7.- ∫lnx dx=lnx•x-∫1/x•x dx
=x lnx-∫1•dx
=x ln〖x-x+c〗
U: lnx du:1/x
V΄: 1 dv: x
8.-∫x sec^2 dx=x•tanx- ∫1•tanxdx
=x•tanx+ln〖(cosx)+ c〗
U: x du: 1
V΄: sec² dv: tanx
9.- ∫arc cotg x dx= ∫arc cotg x•1 dx
=arc cotg x•x- ∫- 1/(1+x^2 )•xdx
=x arc cotg x+∫x/(1+x^2 ) dx
=x arc cotg x+1/2 ln(1+x^2 )+c
U: arc cot x du: 1/(1+x^2 )
V΄:1 dv: x
10.-∫(2x-5)senx dx=(2x-5)(-cosx)+2∫cosx dx
=-(2x-5)cosx+2 senx+c
U: 2x-5 du:2
V΄: senx dv: -cosx
11.-x e^5 ˣ dx=x•(e^5 ˣ)/5-(∫e^5 ˣ)/5 dx=(xe^5 ˣ)/5-1/5 ((e^5 ˣ)/5)
= (xe^5 ˣ)/5-(e^5 ˣ)/25=((5xe^5 ˣ-e^5 ˣ)/25)
= (e^5 ˣ(5x-1))/25+c
U: x du: 1
V: e⁵ˣ dv: e⁵ˣ/5
12.-sen^-
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