| Sumario: | Keywords: f(R, T) gravity; FLRW spacetime; quadratic deceleration parameter EN f(R, T) gravity FLRW spacetime quadratic deceleration parameter 259 268 10 03/11/22 20220301 NES 220301 1 Introduction Since the last hundred years of the general theory of relativity, it is believed through some experimental results that it successfully explains numerous cosmological and astrophysical phenomena. For I h i SB 2 sb ( I R i ) = I R i and I h i SB 3 sb ( I T i ) = I T i , Eq. (4) takes the form HT <math display="block" overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>G</mi><mi>i</mi><mi>j</mi></msub><mo>=</mo><mfenced close=")" open="("><mfrac><mn>8</mn><mi> </mi><mo>+</mo><mi> </mi><mi> </mi></mfrac></mfenced><msub><mi>T</mi><mi>i</mi><mi>j</mi></msub><mo>+</mo><mfrac><mn>1</mn><mn>2</mn></mfrac><mo stretchy="false">(</mo><mi> </mi><mo>-</mo><mi>p</mi><mo stretchy="false">)</mo><msub><mi>g</mi><mi>i</mi><mi>j</mi></msub><mo>.</mo></math> ht Graph (5)For both the choices of I f i ( I R i , I T i ), it is observed that both the sets of field equations overlap with each other for HT <math overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mi> </mi><mo>=</mo><mfrac><mn>1</mn><mn>2</mn></mfrac></math> ht and I i = 1.
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