设半径为Ra,Rb,Rcpi(Rb^2+Rc^2)=4/5piRa^2阴影AB=1/5piRb^2阴影AC=1/3piRc^2阴影AB+AC=1/6piRa^2Ra^2/Rb^2=4/3Ra^2/Rc^2=20面积比=20：15：1^符号是乘吗?

Question

设半径为Ra,Rb,Rc
pi(Rb^2 + Rc^2) = 4/5 pi Ra^2
阴影AB = 1/5 pi Rb^2
阴影AC = 1/3 pi Rc^2
阴影AB+AC = 1/6 pi Ra^2
Ra^2 / Rb^2 = 4/3
Ra^2 / Rc^2 = 20
面积比 = 20：15：1 ^符号是乘吗?

Answer 1

是乘方运算.