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Student Support Forum: 'Second order differential equation w/inval answer' topicStudent Support Forum > General > "Second order differential equation w/inval answer"

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Lauren
10/11/05 4:57pm

I put into mathmatica
DSolve[{y''[t] - 2y'[t] - 3y[t] == 3t(\[ExponentialE](2t))}, y[t], t]

the result is
\!\({{y[t] -> \(-\(2\/9\)\)\ \((14\ \[ExponentialE] -
12\ \[ExponentialE]\ t + 9\ \[ExponentialE]\ t\^2)\) + \
\[ExponentialE]\^\(-t\)\ C[1] + \[ExponentialE]\^\(3\ t\)\ C[2]}}\)

So basically the problem is it says part of the answer is 14Exp + ..., but it is the exponent of nothing, this answer makes no sense, what is wrong?

Attachment: Untitled-1.nb, URL: ,

Subject (listing for 'Second order differential equation w/inval answer')
Author Date Posted
Second order differential equation w/inval answer Lauren 10/11/05 4:57pm
Re: Second order differential equation w/inval ... Eric Harley 10/12/05 11:25am
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