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Question: diff problem with dynamic functions

Question:diff problem with dynamic functions

sama 5 Maple
student
December 05 2011
0

Hi.

I have two complex functions with 3 variables: z1,z2,t . I need the first derivative of one of these functions with respect to one variable onle. Here is what I did:

f1:=z1(t)+2*z2(t):

f2:=z1(t)-3*z2(t):

diff(f1,z1(t)) this gives me an error. I need to write the variable as z1(t) not z1 because I'm doing some calculations for different time.

Thanks for the help.
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