Prove by direct substitution the equivalence of equation (2.5.9) and (2.5.10), which describe the direct form II structure to the relation (2.5.6), which describes the direct form Istructure.

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(2.5.10) y(n) = > b, w(n - k) k= a,uin - ki + x(n) (2.5.9) u(n) %3D k-1 Lany(n – k) + buxin - k) (2.5.6) y(n) k=1