一道函数体很急的1 设f(x)是定义在R上的函数,其图像关于原点对称,且当x>0时,f(x)=2^x-3,则f(-2)=A1 B-1 C 1/4 D-(11/4)2 已知a<b<0,奇函数f(x)的定义域位[a,-a] 在区间[-b,-a]上单调递减且f(x)>0 则在
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![一道函数体很急的1 设f(x)是定义在R上的函数,其图像关于原点对称,且当x>0时,f(x)=2^x-3,则f(-2)=A1 B-1 C 1/4 D-(11/4)2 已知a<b<0,奇函数f(x)的定义域位[a,-a] 在区间[-b,-a]上单调递减且f(x)>0 则在](/uploads/image/z/13571845-61-5.jpg?t=%E4%B8%80%E9%81%93%E5%87%BD%E6%95%B0%E4%BD%93%E5%BE%88%E6%80%A5%E7%9A%841+%E8%AE%BEf%28x%29%E6%98%AF%E5%AE%9A%E4%B9%89%E5%9C%A8R%E4%B8%8A%E7%9A%84%E5%87%BD%E6%95%B0%2C%E5%85%B6%E5%9B%BE%E5%83%8F%E5%85%B3%E4%BA%8E%E5%8E%9F%E7%82%B9%E5%AF%B9%E7%A7%B0%2C%E4%B8%94%E5%BD%93x%26gt%3B0%E6%97%B6%2Cf%28x%29%3D2%5Ex-3%2C%E5%88%99f%28-2%29%3DA1+B-1+C+1%2F4+D-%2811%2F4%292+%E5%B7%B2%E7%9F%A5a%26lt%3Bb%26lt%3B0%2C%E5%A5%87%E5%87%BD%E6%95%B0f%28x%29%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9F%9F%E4%BD%8D%5Ba%2C-a%5D+%E5%9C%A8%E5%8C%BA%E9%97%B4%5B-b%2C-a%5D%E4%B8%8A%E5%8D%95%E8%B0%83%E9%80%92%E5%87%8F%E4%B8%94f%28x%29%26gt%3B0+%E5%88%99%E5%9C%A8)
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