Calculation: gk764g - 1

c  = 
 
 (x_d+x_m)
/ 2
c =  
 (x_d+x_m)
/ 2
cc = xd+xm2\frac{x_{d}+x_{m}}{2}
c =  
 x_d
/ 2
+ 
 x_m
/ 2
cc = xd2+xm2\frac{x_{d}}{2}+\frac{x_{m}}{2}
c =  0.5* x_d+ 0.5* x_mcc = 0.5xd+0.5xm0.5\cdot x_{d}+0.5\cdot x_{m}