f（x 1）=8x 7x=1 rcosA,y=-1 rsinA,r>0,A|ax b|0)(x^2)^2 2*5*x^2 5^2-_其他解答

f（x 1）=8x 7x=1 rcosA,y=-1 rsinA,r>0,A
|ax b|0)(x^2)^2 2*5*x^2 5^2-[(5x)^2-2*1*5x 1^2]=0

人气：189 ℃　时间：2020-10-02 07:08:56

解答

x=1 rcosA,y=-1 rsinA,r>0,Ax2 = (-5)2 = 25比方COSA COSB COSC比方x=1 rcosA,y=-1 rsinA,r>0,A