\(\left(-2\right)^{190}=2^{190}>2^{182}=\left(2^7\right)^{26}=128^{26}\)
\(128^{26}>125^{26}=\left(5^3\right)^{26}=5^{78}>5^{76}\)
\(\Rightarrow\left(-2\right)^{190}>5^{76}\)
5⁷⁶ = (5²)³⁸ = 25³⁸
(-2)¹⁹⁰ = 2¹⁹⁰ = (2⁵)³⁸ = 32³⁸
Do 26 < 32 nên 25³⁸ < 32³⁸
⇒ 5⁷⁶ < (-2)¹⁹⁰