以赛亚书解释大全:怎样证x^4+ y^4 = z^4 没有整数解

怎样证x^4+ y^4 = z^4 没有整数解 已知3x-z=x+y+z=4x+2y-z,求x : y : z x =2y,3y=4z,则x:y:z =?:?:? 2x+5y+4z=0,3x+y-7z=0,则x+y-z=? 2x+5y+4z=0,3x+y-7z=0,则x+y-z=? 13x+5y+9z=12.7 2x+4y+3z=4.7 x+y+z=? X+Y+Z=6 X-3Y+2Z=1 3X+2Y-Z=4 2x+Y+3z=23,x+4y+5z=36,求X+2Y+3z~~~~ 已知3x+7y+z=315和4x+10y+z=420,求x+y+z 设x.y.z满足3x=4y=6z（x.y.z都是指数）求证