2011
Mathematics
JAMB
A binary operation ⊕ on real numbers is defined by x ⊕ y = xy + x + y for two real numbers x and y. Find the value of 3 ⊕ -2/3 .
A.
- 1/2
B.
1/3
C.
-1
D.
2
Correct Answer: 2
Explanation
N + Y = XY + X + Y 3 + -2/3 = 3(- 2/3) + 3 + (- 2/3) = -2 + 3 -2/3 = 1−2/1−3 = 1/3
N + Y = XY + X + Y 3 + -2/3 = 3(- 2/3) + 3 + (- 2/3) = -2 + 3 -2/3 = 1−2/1−3 = 1/3THIS WEEK's
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