Question

规定新运算符号为*的运算过程为a*b=1/3a-1/3b

Answer 1

a*b=1/3a-1/3b

令a=5,b=-5

所以5*(-5)=1/3×5-1/3×(-5)=5/3+5/3=10/3

令a=2,b=x

则2*x=1/3×2-1/3×x=(2-x)/3

所以2*(2*x)=2*[(2-x)/3]

又令a=2,b=(2-x)/3

所以左边=2*[(2-x)/3]=1/3×2-1/3×[(2-x...