Changing Limits of Integration affects variable substitution?

  • Thread starter DrMath
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  • #1
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  • #2
lanedance
Homework Helper
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not exactly sure what the question is...

couple of points though, it is usually easier to use a different dummy variable when you use a subtitution

say you have
[tex] \int_b^a dt f(t) [/tex]

and want to change to u(t) = t/2, then
t=2u
dt = 2.du
u(a) = a/2
u(b) = b/2

so the integral becomes
[tex] \int_{b/2}^{a/2} 2.du f(2u) [/tex]

see how this compares with your case...
 
  • #3
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thanks
 

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