anonymous
  • anonymous
How do you evaluate the following integral analytically (no graphs, or calculators)?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
\[\int\limits_{0}^{5}\left| (x^2-5x+4) \right| dx\]
anonymous
  • anonymous
Thanks! How did you get those 3 parts (this is kinda dumb, but sorry).
anonymous
  • anonymous
when you put x=1 the absolute value is positive when you put x=2 and three absolute value is negative (thats why i put - sign in front of second integral ) for x=4 and 5 absolute value is again positive .

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anonymous
  • anonymous
Isn't it 0 @ 1?
anonymous
  • anonymous
yes it is because at x=0 still abs (x^-5x+4) =(0-0+4)=4 positive .
anonymous
  • anonymous
Should the second integral be from 1 to 4 instead of 1 to 3, and the third integral be from 4 to 5?
anonymous
  • anonymous
at x=1 yes zero .
anonymous
  • anonymous
so the second integral should be from 1 to 4, and the 3rd one 4 to 5?
anonymous
  • anonymous
sorry i wrote it wrong . you are right first from 0..1 second from 1..4 and third from 4..5
anonymous
  • anonymous
\[\Large \int\limits_{0}^{1} (x^2-5x+4)dx-\int\limits_{1}^{4} (x^2-5x+4)dx+\int\limits_{4}^{5}(x^2-5x+4)dx\]

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