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Math Help - Mathcad Second Derivative Test Issue

  1. #1
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    Mathcad Second Derivative Test Issue

    I'm trying to do a simple second derivative test on mathcad but the answer I always get is 0. I'm totally baffled now.
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  2. #2
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    Quote Originally Posted by Turlock View Post
    I'm trying to do a simple second derivative test on mathcad but the answer I always get is 0. I'm totally baffled now.
    How can we help you unless you post an actual problem?
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  3. #3
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    I thought it would be a common error given the same result everytime.
    I defined my function V(x):=xxxxxx
    Then typed in the following

    \frac{d^2}{dx^2} V(Stationary point value)

    and it gives 0 everytime. I managed to work it out by doing \frac{d^2}{dx^2} V(x) and typing x:=(Stationary point value) above it.
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  4. #4
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    Here is how I do it. It takes a second function on my version.
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