170426-3333
已知:(b-c)^2=(c-a)^2=(a-b)^2,求证:a=b=c
170426-3330
已知:(3x-22y)/(3x+2y)=1/3,求:(x^2+y^2)/(7x^2-xy)的值。
170408-3095
已知:ax=by=cz=1,求 1/(1+a^4)+1/(1+b^4)+1/(1+c^4)+1/(1+x^4)+1/(1+y^4)+1/(1+z^4)
170408-3097
170408-3096
已知x/(a-b)=y(b-c)=z(c-a),求(x+y+z)/(2013a+2014b+2015c)的值
170426-3324