The following operations are defined for real numbers:
$a \neq b = a + b$ if $a$ and $b$ both are positive
else $a \neq b = 1$.
$a \bigtriangledown b = (ab)^{a+b}$ if $ab$ is positive
else $a \bigtriangledown b = 1$.
The value of $\frac{(2\neq3)\neq ((-1)\Delta 5)}{(1\Delta 2) \neq((-1)\neq5)}$ is
- $2/3$
- $1/2$
- $1/3$
- None of these