Question: Need help in the following discrete math (a) Solve the recurence relation a = - 2a _ + 15a _,, an = 2, a, =

Need help in the following discrete math

(a) Solve the recurence relation a = - 2a _ + 15a _,, an = 2, a, = - 2. (b) (i) Show that 7 is an inverse of 12 modulo 83. (ii) Solve the linear congruence 12x = 21 (mod83)

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