1.

Find the value of ( frac{1}{1^4} + frac{1}{3^4} + frac{1}{5^4} + frac{1}{7^4} ) + .by finding the half range Fourier cosine series of the function f(x) = x in the interval 0<x<l.

A. ( frac{ pi^4}{12} )
B. ( frac{ pi^4}{48} )
C. ( frac{ pi^4}{24} )
D. ( frac{ pi^4}{96} )
Answer» E.


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