what are the sum and difference of identity function and reciprocal function? Share with your friends Share 1 Aman Choubey answered this Dear Student,An identity function can be fx=xThe reciprocal function is not specified here.If it means multiplicate reciprocal then gx=1xTherefore, sum would be fx+gx=x+1xdifference fx-gx=x-1xRegards. 2 View Full Answer