Hi, Thomas Richard 832

Solution:

y = sum(n=0..infinity, An*(X^n)=A0*(1+x^2+1/2!*x^4+...+(1/n!)*x^2*n+...)

Hi, Kitonum 3615

quite pleasant response

Many thanks

Bernard

The Author is vivid and very nice ! 

I like the way my question was answered, clearly it's good to know that such persons exist ...

Best wishes

Bernard

The Author is vivid and very nice ! 

I like the way my question was answered, clearly it's good to know that such persons exist ...

Best wishes

Bernard