x(x_7)=8(7_x)怎么算

x(x_7)=8(7_x)怎么算 3x(x_7)=0.6 4x+2（10_x）=30 怎么算 设集合A={x|x+1_x怎么求 解60÷x=40÷(20_x)帮忙 0.8X+0.6（12_X）=8.4 y=(1_x)/(1+x)的反函数 函数y=（e^x-e^_x)/2的反函数 java问题..谢谢lass Point { double x,y,z; Point(double _x,double _y,double _z) { x = _x; y = _y;class Point {double x,y,z;Point(double _x,double _y,double _z) {x = _x;y = _y;z = _z;}void setX(double _x) {x = _x;}double getDistance(Point p) {return 已知x是正整数,y=x^2_x+1/x最小值是多少? 3x十2分之3_x,其中x=3 已知函数f(x)=loga(1_x)+loga(x+3)(0 化简：(x+3)(x_3)_x(x+3) 大大们写一下,注释啊,求class Point {double x,y,z;Point(double _x,double _y,double _z) {x = _x;y = _y;z = _z;}void setX(double _x) {x = _x;}double getDistance(Point p) {return (x - p.x)*(x - p.x) + (y - p.y)*(y - p.y) + (z - p.z)*(z - p.z);}} 根据方程5x+6(18_x)=100来编写一道应用题, 1 —x(10_x)=12(因式分解法) 2 求函数f(x)=log1/2(_x²_2x+3)的单调区间. 抛物线y=x²_x的顶点坐标是（）