If f(x)=1/xf(x) = 1/xf(x)=1/x and f(a)=2f(a) = 2f(a)=2, find aaa.
a=1/2a = 1/2a=1/2
a=2a = 2a=2
a=−1/2a = -1/2a=−1/2
a=−2a = -2a=−2