The number of integers in the domain of function, satisfying f(x)+fx−1=x3+1x, is ______.
f(x)+f1x=x2+1x
Replacing x by 1x, we get f1x+f(x)=1x2+x
or 1x2+x=x2+1xor x−1x=x2−1x2or x−1x=x−1xx+1xor x−1xx+1x−1=0
x=1x; x+1x=1 (rejected)
Hence, x=1 or −1.