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Question

Which of the following statements is INCORRECT?
  1. The multiplicative identify for integers is 1
  2. Subtraction does not obey commutative law in integers
  3. Multiplication of two integers with unlike signs is always positive
  4. Multiplicative inverse of integer a is 1a

A
Multiplication of two integers with unlike signs is always positive
B
Multiplicative inverse of integer a is 1a
C
Subtraction does not obey commutative law in integers
D
The multiplicative identify for integers is 1
Solution
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