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…on maths. logic and reasoning

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Integrals

Up a level : Calculus and Analysis
Previous page : The hyperbolic functions
Next page : Differential Equations

Integrals

  • Integrals – a definition
  • The fundamental theorem of calculus
  • The connection between the definite and indefinite integral
  • Some standard integrals

Integration by substitution

  • Integration by substitution
  • Integration of definite integrals using substitution

Integration by parts

  • Integration by parts
  • One function is in the form xn and the other can be integrated at least n times
  • One of the functions is sin(bx) or cos(bx) or a linear combination of them, the other is an exponential function
  • We have only one function, but one we can differentiate, e.g. arcsine, \int {{{\sin }^{ - 1}}x\;dx}  
  • One is a logarithm

Some various integrals

  • The integral of sin(x)cos(x) dx, \int {\sin x\cos x\;dx}  
  • The integral of 1/sqrt(1-x^2) dx,\int {\frac{{dx}}{{\sqrt {1 - {x^2}} }}}
  • The integral of one over sqrt(x^2+1) dx, \int {\frac{{dx}}{{\sqrt {{x^2} + 1} }}}  
  • The integral of sqrt(1-x^2) dx, \int {\sqrt {1 - {x^2}} \,dx}  
  • The integral of sqrt(x^2-1) dx,\int {\sqrt {{x^2}-1} \,dx}  
  • The integral of sqrt(x^2+1) dx, \int {\sqrt {{x^2} + 1} \,dx}  

A rather peculiar rule

  • Differentiation under the integral sign -Leibniz integral rule

Some special integrals

  • The integral \int\limits_0^\infty {\frac{{{e^{ - px}} - {e^{ - qx}}}}{x}dx}
  • The integral \int\limits_{ - \infty }^\infty  {\frac{{\sin x}}{x}dx}  
  • The integral \int\limits_0^1 {\frac{{\ln (x + 1)}}{{{x^2} + 1}}dx}  
  • The integral \int\limits_{ - \infty }^\infty  {{e^{ - {x^2}}}dx}   
  • The integral \int\limits_{ - \infty }^\infty  {{e^{ - {x^2}}}dx}   , a second way.
Up a level : Calculus and Analysis
Previous page : The hyperbolic functions
Next page : Differential EquationsLast modified: May 18, 2019 @ 12:59
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