f(x)=y=lg(x+gen(x2+1)) 10^y=x+gen(x2+1)
lg(x+gen(x2+1))+lg(gen(x2+1)-x)=lg1=0
lg(x+gen(x2+1))=-lg(gen(x2+1)-x)=y 10^(-y)=gen(x2+1)-x
10^y-10^(-y)=2x
x=(10^y-10^(-y))/2
反函数即为
y=(10^x-10^(-x))/2
f(x)=y=lg(x+gen(x2+1)) 10^y=x+gen(x2+1)
lg(x+gen(x2+1))+lg(gen(x2+1)-x)=lg1=0
lg(x+gen(x2+1))=-lg(gen(x2+1)-x)=y 10^(-y)=gen(x2+1)-x
10^y-10^(-y)=2x
x=(10^y-10^(-y))/2
反函数即为
y=(10^x-10^(-x))/2