Question

3分之3x-1=1-6分之4x-z怎么解 最好有方法

Answer 1

a=2^x

y=(a-1)/(a+1)

y-1=(a-1-a-1)/(a+1)=-2/(a+1)

a+1=-2/(y-1)

a=2^x=(-1-y)/(y-1)

x=log2[(-1-y)/(y-1)]

反函数y=log2[(-1-x)/(x-1)]