Question

计算 分式加减法1/a-1/2a=1+1/(a+1)=a-1+1/a+1=分式的加减法,

Answer 1

1/a-1/2a=2/2a-1/2a=1/2a

1+1/(a+1)=(a+1)/(a+1)+1/(a+1)=(a+2)/(a+1)

a-1+1/a+1=a+1/a=(a^2+1)/a