Given an arithmetic sequence ana_nan, if ak=1ma_k = \frac{1}{m}ak=m1 and am=1ka_m = \frac{1}{k}am=k1 (where k≠mk \neq mk=m), what is the value of akma_{km}akm?
000
111
1km\frac{1}{km}km1
k+mkm\frac{k+m}{km}kmk+m