7-15  ʹfinverseз㡣
⣺Enterȷϡ
>> syms x y
>> f = x^2+y]
>> f = x^2+y 
f = 
x^2+y 
>> finverse(f,y) 
ans = 
-x^2+y 
>> finverse(f)
Warning: finverse(x^2+y) is not unique.
> In C:\MATLAB 7.16p5\toolbox\symbolic\@sym\finverse.m at line 43 
ans =
(-y+x)^(1/2) 
>>
