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ptc-60038591-Visitor
1-Visitor
May 18, 2014 1:42 PM UTC
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help with derivatives

I am new to mathcad and i dont know how use mathcad so can u tell how i can see the derivatives of af function r(t): e^t+(2/9)'e^2*t , t = ln 3 idont understand all the differential equation feature with adams, BDF , Jacob and so on pls help

AlanStevensAnswer
19-Tanzanite
May 18, 2014 2:32 PM UTC

Like so?

drdt.PNG

Above done in MC15. You will need to choose these operators from the Ribbon if you are using Prime.

Adams, BDF, etc. are for use in solving ordinary differential equations (i.e. when you only have dr/dt, but want r).

Alan

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6 replies

AlanStevens19-TanzaniteAnswer
19-Tanzanite
May 18, 2014 2:32 PM UTC

Like so?

drdt.PNG

Above done in MC15. You will need to choose these operators from the Ribbon if you are using Prime.

Adams, BDF, etc. are for use in solving ordinary differential equations (i.e. when you only have dr/dt, but want r).

Alan

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    ptc-60038591-VisitorAuthor
    1-Visitor
    May 18, 2014 5:25 PM UTC

    ok i get the idea but my problem is that my function is like e^t i+(2/9)'e^2*t j how do i get the derivative and at the same time ignoring the i and the j i (the promblem is that i have vector valued fucktion where i need to find acceleration and velocity . i would like to use mathcad so i can show that i take take i and j in my consideration. sry for my bad english and ty for the first answer

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    Werner_E
    Werner_E25-Diamond I
    25-Diamond I
    May 18, 2014 6:53 PM UTC

    Not really sure what you exactly need.

    Guess its time for you to attach your sheet.

    As I understand it you have a vector t and the function you describe is dependent on two indices i, j (f(i,j):=...)?

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