Answer:
The answer is 14/8
Step-by-step explanation:
 
        
             
        
        
        
Answer:
the correct answer is 8.7
 
        
                    
             
        
        
        
Answer:
8.20
Step-by-step explanation:
use your brain next time its realy easy or pay attantion to class 
 
        
                    
             
        
        
        
F(x) = 3x+1
put x = a+h
f(a+h)  = 3(a+h) + 1
f(a+h) = 3a + 3h + 1
put x = a
f(a) = 3a + 1
f(a+h)-f(a) = 3a + 3h + 1 -(3a+1)
f(a+h)-f(a) = 3a +3h + 1 - 3a -1
f(a+h)-f(a) = 3h