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Question
Let * be a binary operation on the set I of integers, defined by a * b = 2a + b − 3. Find the value of 3 * 4.
Solution
Given: a * b = 2a + b − 3
3 * 4 = 2 (3) + 4 \[-\] 3
= 6 + 4 \[-\] 3
= 7
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