((a^2-b^2-a(a-b))/a(Va+Vb)*a/b=(a^2-b^2-a^2+ab)/b(Va+Vb)=b(a-b)/b(Va+Vb)=(a-b)/(Va+Vb)=(Va+Vb)(Va-Vb)/(Va+Vb)=Va-Vb
при a=4^-2 и b=27^2/3
4^-2*1/2 + 27^2/3*1/2=4^-1 + 3^3*1/3=1/4 + 3=3 1/4
2^4+((V5+2)^2+(V5-2)^2)/(V5+2)(V5-2)-27=(5+4V5+4 + 5-4V5+4)/(5-4) - 11=18/1 -11=7
Vk/Vk(Vk-1) -2/(Vk-1)(Vk+1)= (Vk(Vk+1) - 2Vk)/(Vk-1)(Vk+1)=(k-2Vk+Vk)/(Vk-1)(Vk+1)= Vk(Vk-1)/(Vk-1)(Vk+1)=Vk/(Vk+1)
при k=(1/16)^-1/2=V16=4
V4/(V4+1)=2/3