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Question

A is the additive inverse of 57 and B is the multiplicative inverse of 89. Find the multiplicative inverse of A + B.

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Solution

Additive inverse of A = (57) = 57
Multiplicative inverse of B = 1(89)=98

A + B = 57 + (98)= (5×8) + (9×7)7×8= 40 6356= 10356

Multiplicative inverse of A + B is 1(10356) = 56103

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