Step-by-step explanation:
You've got the concept correct, but be careful with your parentheses. You should write it 3/(2n). Otherwise it looks like three halves n.
The would be even and I assume you have the answer
Square (added characters)
A function is something that lets you work out what something is depending a variable
e.g: x = y + 5
this function states that the unknown x is equal to whatever the variable y is plus 5
