INTEGRATION MYSTERY

[beginner]

Hi everybody!

what happen with my integration?.

I generated a function f(y) and integrated it in it's step and the value match with the simply calculation. But when I integrated the function from begin to end in one step, the integrate shows a wrong value. The function plot is clear!

Is this a mystery?

Thank you everybody

[Fred_Kohlhepp · Accepted solution]

You're seeing a symptom of tolerance in calculation. 

Go to the calculation tab and change TOL from 10^-3 to 10^-7

[beginner]

Thank you FredKohlhepp

you are right. Changing TOL to 10^-7 the problem was solved.

Would be useful if the software notice you about this type of difference.

Thank you

[Fred_Kohlhepp]

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wrote:

Would be useful if the software notice you about this type of difference

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Mathcad is a tool.  Like any tool it has things it does well, and limitations.  We all need to learn to use our tools correctly.

How would the software know that this problem existed?  It gave you an answer correct within the tolerance you specified.