亲爱的网友:10^-6.5*10^4.5-10^-6.5 = -3.1622776601684 * 10 -7CF=CA AF=CA AB/2

问题描述:

亲爱的网友:10^-6.5*10^4.5-10^-6.5 = -3.1622776601684 * 10 -7CF=CA AF=CA AB/2
A= b=(x^2)^2 2*5*x^2 5^2-[(5x)^2-2*1*5x 1^2]=0

x=1 rcosA,y=-1 rsinA,r>0,A|ax b|0)假设ax*2 bx c=0中 -ac0,A