more on energy and randi´c energy of specific graphs

Let g be a simple graph of order n. the energy e(g) ofg is the sum of the absolute values of the eigenvalues of g. the randi´cmatrix of g, denoted by r(g), is defined as the n×n matrix whose (i, j)-entry is (didj ) ?12 if vi and vj are adjacent and 0 for another cases. therandi´c energy re(g) of g is the sum of absolute values of the eigenvaluesof r(g). in this paper we compute the energy and the randi´cenergy for certain graphs. we also propose a conjecture on the randi´cenergy