A binary operation ⊕ ⊕ om real numbers is defined by x ⊕ ⊕ y = xy + x + y for two real numbers x and y. Find the value of 3 ⊕ ⊕ - 23 2 3 .

Assessment: JAMB UTME - Mathematics - 2011 Subject: General Mathematics

Question 1 Report

A binary operation $\oplus$ om real numbers is defined by x $\oplus$ y = xy + x + y for two real numbers x and y. Find the value of 3 $\oplus$ - $\frac{2}{3}$ .

-

\frac{1}{2}

\frac{1}{3}

-1

2

Answer Details

N + Y = XY + X + Y
3 + - $\frac{2}{3}$ = 3(- $\frac{2}{3}$ ) + 3 + (- $\frac{2}{3}$ )
= -2 + 3 - $\frac{2}{3}$
= $\frac{1 - 2}{1 - 3}$
= $\frac{1}{3}$

Read lesson note on Binary Operations (JAMB)

Binary Operations

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