设函数f(x)= x2+2 (x≥2) 2x (x<2) ,则f(-4)=_____ ,若f(x0)=8,则x0=______.设函数f(x)= x2+2 (x≥2)\x052x (x<2) \x05 ,则f(-4)=_____ ,若f(x0)=8,则x0=______.
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![设函数f(x)= x2+2 (x≥2) 2x (x<2) ,则f(-4)=_____ ,若f(x0)=8,则x0=______.设函数f(x)= x2+2 (x≥2)\x052x (x<2) \x05 ,则f(-4)=_____ ,若f(x0)=8,则x0=______.](/uploads/image/z/6089908-4-8.jpg?t=%E8%AE%BE%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3D+x2%2B2+%28x%E2%89%A52%29+2x+%28x%EF%BC%9C2%29+%2C%E5%88%99f%28-4%29%3D_____+%2C%E8%8B%A5f%EF%BC%88x0%EF%BC%89%3D8%2C%E5%88%99x0%3D______%EF%BC%8E%E8%AE%BE%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3D+x2%2B2+%28x%E2%89%A52%29%5Cx052x+%28x%EF%BC%9C2%29+%5Cx05+%2C%E5%88%99f%28-4%29%3D_____+%2C%E8%8B%A5f%EF%BC%88x0%EF%BC%89%3D8%2C%E5%88%99x0%3D______%EF%BC%8E)
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设函数f(x)= x2+2 (x≥2) 2x (x<2) ,则f(-4)=_____ ,若f(x0)=8,则x0=______.设函数f(x)= x2+2 (x≥2)\x052x (x<2) \x05 ,则f(-4)=_____ ,若f(x0)=8,则x0=______.
设函数f(x)= x2+2 (x≥2) 2x (x<2) ,则f(-4)=_____ ,若f(x0)=8,则x0=______.
设函数f(x)=
x2+2 (x≥2)\x052x (x<2) \x05 ,则f(-4)=_____ ,若f(x0)=8,则x0=______.
设函数f(x)= x2+2 (x≥2) 2x (x<2) ,则f(-4)=_____ ,若f(x0)=8,则x0=______.设函数f(x)= x2+2 (x≥2)\x052x (x<2) \x05 ,则f(-4)=_____ ,若f(x0)=8,则x0=______.
-8 ; 根号6
f(-4)=-8;x0=根号6