数学问题,反函数!!!
由Y=1-(2/x+3)(x属于R,且x不等于-3)
参考答案:y=1-2/(x+3)
=(x+3-2)/(x+3)
=(x+1)/(x+3)
(x+3)y=x+1
x(y-1)=1-3y
x=(1-3y)/(y-1)
互换x,y
y=(1-3x)/(x-1) x属于R,且x不等于1
由Y=1-(2/x+3)(x属于R,且x不等于-3)
参考答案:y=1-2/(x+3)
=(x+3-2)/(x+3)
=(x+1)/(x+3)
(x+3)y=x+1
x(y-1)=1-3y
x=(1-3y)/(y-1)
互换x,y
y=(1-3x)/(x-1) x属于R,且x不等于1