24. Three marks exercise problem III

1. LEADERS is a WhatsApp group with $256$ members. Every one of its member is an admin for their own WhatsApp group with $256$ distinct members. When a message is posted in LEADERS and everybody forwards the same to their own group, then how many members in total will receive that message?

 

 

 members will receive the message.

 

2. Find the value of $w$, given that $x = 3$, $y = 4$, $z = -2$ and $w = x^2 - y^2 + z^2 - xyz$.

 

 

$w =$