设亩产量的增长率m
200X(1+m)*0.5*(1+m/2)=132
(m+1)(m+2)=2.64
mm+3m+2=2.64
(m+3/2)(m+3/2)-9/4+2=2.64
(m+3/2)(m+3/2)=2.64+0.25
m=1.7-1.5=0.2
设亩产量的增长率m
200X(1+m)*0.5*(1+m/2)=132
(m+1)(m+2)=2.64
mm+3m+2=2.64
(m+3/2)(m+3/2)-9/4+2=2.64
(m+3/2)(m+3/2)=2.64+0.25
m=1.7-1.5=0.2