-14 + x 
Is the correct answer
        
                    
             
        
        
        
Answer:

Period is 2π 
Horizontal shift = 0
Step-by-step explanation:
We know that 
 and as 
, so, we can write 
Therefore, the if 
 then 
 (Answer)
Now, the period of 
 is 2π, hence the period of 
 is also 2π.  (Answer)
Again. 
, hence, the horizontal shift of 
 is 0. (Answer)
 
        
             
        
        
        
1/(1/R1 + 1/R2 + 1/R3)
= 1/ (R2R3 + R1R3 + R1R2)/R1R2R3
= R1R2R3/ (R2R3 + R1R3 + R1R2)