If a binary operation is defined by x y x 2y fi... - JAMB Mathematics 2013 Question
If a binary operation * is defined by x * y = x + 2y, find 2 * (3 * 4)
A
24
B
16
C
14
D
26
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Correct Option: A
x * y = x + 2y (given)
3 * 4 = 3 + 2(4) = 11
Hence, 2 * (3 * 4) = 2 * 11
= 2 + 2(11)
= 2 + 22
= 24
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