2c分之a的平方b乘以根号下a的立方b分之8c的立方(a>0,b>0)=(a^2*b/2c)*根号下(8c^3/a^3*b)=(a^2*b/2c)*根号下(8c^3*ab/a^3*b*ab)=(a^2*b/2c)*根号下(8c^3*ab/a^4*b^2)=(a^2*b/2c)*(2c/a^2*b)根号下(ab)=根号下(ab)...