If f: R R belongs to C(R) and f(j) is periodic for all j > 0, prove
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uniformly for all j N.
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di f dxi (x) =-dx) (ak(f) cos kx + bk(f) sin kx) に!
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Fix j N Since It follows from Theorem 1423 that d j dx j a k f cos kx 1k 2 for k ...View the full answer
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