Jambmaths question:
A binary operation $\oplus $on real number us defined by $x\oplus y=xy+x+y$for two real numbers x and y. Find the value of $3\oplus -\tfrac{2}{3}$
Option A:
–1
Option B:
2
Option C:
$\frac{1}{3}$
Option D:
$-\frac{1}{2}$
Jamb Maths Solution:
$3\oplus -\tfrac{2}{3}=3\times (-\tfrac{2}{3})+3-\tfrac{2}{3}=-2+3-\tfrac{2}{3}=\tfrac{-6+9-2}{3}=-\tfrac{1}{3}$
Jamb Maths Topic:
Year of Exam: