Consider the equation 4y" + by' + cy = 0 the constants b,c,m,n are real and different from zero, the general solution has the following form: y(z) = C1emz cos(nz) + C2e™ sen(nz) We can affirm that: O a) ac = 16 O b) ac = 4 Oc) ac > 16 O d) ac > 4

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