Question: Refer to check digit codes in which the check vector is the vector c = [1, 1, . . . , 1] of the appropriate

Refer to check digit codes in which the check vector is the vector c = [1, 1, . . . , 1] of the appropriate length. In each case, find the check digit d that would be appended to the vector u.
u = [1, 2, 2, 2] in Z⁴₃

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