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We consider FLRW cosmological models for perfect fluid (with ρ as the energy density) in the frame work of the f(ρ) modified theory of gravity [V. N. Tunyak, Russ. Phys. J. 21, 1221 (1978);J. R. Ray, L. L. Smalley, Phys. Rev. D. 26, 2615 (1982)]. This the