已知x=a+1/(a+2) (a>2) y=(1/2)^(b^2-2) (b

问题描述:

已知x=a+1/(a+2) (a>2) y=(1/2)^(b^2-2) (b

x=1-1/(a+2),a>2,x属于(3/4,1) b