Abstract
In this research, we have investigated tachyon and [Formula: see text]-essence dark energy (DE) candidates with varying [Formula: see text] and [Formula: see text] for Marder universe in [Formula: see text] gravitation theory [Harko et al., Phys. Rev. D 84, 024020 (2011)]. Here, [Formula: see text] is the arbitrary function of Ricci scalar ([Formula: see text]) and the trace of [Formula: see text]. To solve [Formula: see text] gravity field equations, three different approximations have been used such as cosmological term, equation of state (EoS) parameter and the anisotropy feature of Marder universe. Also, we have discussed some physical results with various graphics.
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