Question: How cant i use collect in this case?

April 22 2014 siamak taghavi 35
Maple 15

Plz help me friends ...

I gave this function ...


i wanna extract coeffitions from this function ... for example what is the coeffition of phi(X)*psi(x)?

i used coeff ... but it had an error ..

unable compute coeff ...

i used collect ... but it had an error

what am i doing with this problem?



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