2^(x^2-4)>0.25..
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2^(x^2-4)>0.25..2^(x^2-4)>0.25..2^(x^2-4)>0.25..2^(x^2-4)>0.25根据指数函数的增减性得x^2-4>-2x^2>2x√2如仍有疑惑,欢迎追问.
2^(x^2-4)>0.25..
2^(x^2-4)>0.25
..
2^(x^2-4)>0.25..
2^(x^2-4)>0.25
根据指数函数的增减性得
x^2-4>-2
x^2>2
x√2
如仍有疑惑,欢迎追问.
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