2)/(3x-1)x=1 rcosA,y=-1 rsinA,r>0,A
问题描述：
2)/(3x-1)x=1 rcosA,y=-1 rsinA,r>0,A
loga[(x2^2-ax2)/(x1^2-ax1)]>0f(x)=x^5/5-ax^3/3 (a 3)x a^2
答
limx*sin(1/x) x(x-4)(x