Question

Function Notation: f( x + 1 )      f( x ) = 3x + 2

Answer 1

f(x + 1) =
3(x+1) +2 =  
3x + 3 + 2 =  
3x +5 

step 1: insert x+1 in place of x in the equation 
step 2: distribute 3 to x and 1
step 3: combine like terms