Mathematics
Let a and b be real numbers such that ab ≠ 0. Then which of the following statements are true? Justify your answers.
(i) Both a and b must be zero.
(ii) Both a and b must be non-zero.
(iii) Either a or b must be non-zero.
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Answer
The true statement is:
Both a and b must be non-zero.
Reason — If the product of two numbers is non-zero, then both the numbers must be non-zero.
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