

Integration
Presentation
•
Mathematics, Other
•
11th Grade
•
Hard
KASSIA! LLTTF
Used 18+ times
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7 Slides • 0 Questions
1
Integration

2
Basic Results
f(x) ------> ∫f(x)dx note: c is a constant of integration
axn−−>a(n+1xn+1)+c , n=−1
a−−>ax+c
sin x −−>−cos x+c
sin(ax+b)−−>−a1cos(ax+b)+c
cosx −−>sinx+c
cos(ax+b)−−>a1sin(ax+b)+c
(ax+b)n−−>a1 n+1(ax+b)n+1+c, n=−1
3
Reason for c :
dxd(x2+5)=2x
dxd(x2−4)=2x
∫a×f(x)dx=a∫f(x)dx
∫(f(x) +−g(x))dx =∫f(x)dx +−∫g(x)dx
4
Examples
2. ∫5x3 dx 1. ∫x3dx 3.∫9dx
=5∫x3 dx =3+1x3+1+c =9∫x0dx=5(3+1x3+1)+c =4x4+c =9(0+1x0+1)+c
=5 (4x4)+c =41x4+c =9(1x1)+c
=45x4+c =9x+c
5
3. ∫x33 dx 4. ∫ 5x46dx
=∫3x−3dx =∫ 56x−4dx=3∫x−3dx =56∫x−4dx
=3(−3+1x−3+1)+c =56(−4+1x−4+1)+c
=3(−2x−2)+c =56(−3x−3)+c
=−2x23+c =5(3x3)−6+c =−15x36+c−−>−5x32+c
6
5. ∫(3x2−4x)dx 6. ∫(3x−5)4dx 7. ∫3x−4dx
=∫(3x2−4x21)dx =5(3x−5)5×31+c =21+1(3x−4)21+1×31+c=3∫x2dx−4∫x21dx =15(3x−5)5+c =23(3x−4)23×31+c
=3(2+1x2+1)−4(21+1x21+1)+c =29(3x−4)23+c
=3(3x3)−4(23x23)+c =(3x−4)23×92+c
=33x3−(4x23÷23)+c =92(3x−4)23+c
=x3−(4x23×32)+c
=x3−38x23+c
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9. ∫(3sinx−5cosx)dx 11. ∫cos(3x−4)dx
=3∫sinx dx−5∫cos dx =sin(3x−4)×31+c
=3(−cosx)−5(sinx)+c =3sin(3x−4)+c
=−3cosx−5sinx +c
10. ∫(3+5cosx)dx
=3∫x0dx+5∫cosxdx
=3(0+1x0+1)+5(sin x)+c
=3x+5sinx+c
Integration

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