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\(4^{30}=2^{30}.2^{30}=\left(2^3\right)^{10}.\left(2^2\right)^{15}=8^{10}.4^{15}>8^{10}.3^{15}>8^{10}.3^{11}\)

\(=8^{10}.3^{10}.3=3.24^{10}\)

vậy 2^30+3^30+4^30>3.24^10

Giải các phương trình: 2 x 2 + x - 4 2 - 2 x - 1 2 = 0

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