已知f(x)=log1/2(-x²+3x+4),求f(x)值域如图,
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![已知f(x)=log1/2(-x²+3x+4),求f(x)值域如图,](/uploads/image/z/5238649-1-9.jpg?t=%E5%B7%B2%E7%9F%A5f%28x%29%3Dlog1%2F2%28-x%26%23178%3B%2B3x%2B4%29%2C%E6%B1%82f%28x%29%E5%80%BC%E5%9F%9F%E5%A6%82%E5%9B%BE%2C)
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已知f(x)=log1/2(-x²+3x+4),求f(x)值域如图,
已知f(x)=log1/2(-x²+3x+4),求f(x)值域
如图,
已知f(x)=log1/2(-x²+3x+4),求f(x)值域如图,
-x²+3x+4
=-1/4(4x^2-12x+9-25)
=25/4-(2x-3)^2 /4
则 0