MATHEMATICS

JAMB 2013 - Question 21

Mathematics 2013 JAMB Past Questions - Question 21: If a binary operation * is defined by x*y=x+2y,find 2*(3*4)

If a binary operation * is defined by x*y=x+2y,find 2*(3*4)
A:
B:
C:
D:
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Correct Answer

C

Explanation

x*y = x+2y (geven)3*4 = 3+2(4) = 11Hence 2*(3*4) = 2 * 11 = 2+2 (11) = 2+2(11) = 2+22 = 24To find the value of 2*(3*4) using the binary operation *, we need to substitute the given values into the expression x + 2y.Let's start by evaluating 3*4:3*4 = 3 + 2(4) = 3 + 8 = 11Now, we can substitute this value into the expression 2*(3*4):2*(3*4) = 2*11 = 2 + 2(11) = 2 + 22 = 24Therefore, 2*(3*4) equals 24.