x=2^m+1x-1=2^my=3+4^my-3=4^m因为(2^m)²=4^m所以(x-1)²=y-3y=(x-1)²+3化简得y=x²-2x+4
x=2^m+12^m=x-1y=3+4^m=3+2^(2m)=3+(2^m)^2=3+(x-1)^2=x^2-2x+4
x=2*2^m x/2=2^m (x/2)^2=2^(2m)=4^m y=3+4^m=3+x^2/4
Y=(X^2)/4+3
