数学高手，求求您了：对于正整数a,b,c(a小于等于b小于等于c)和非零实数x,y,z,w,

a^x=70^w a=70^(w/x) 同理 b=70^(w/y) c=70^(w/z) abc=70^(w/x+w/y+w/z) =70^[w(1/x+1/y+1/z)] =70=2*5*7 a=2,b=5,c=7