已知函數(shù),f(x)= 4-x^2(x>0),2(x=0),1-2x(x<0){此函數(shù)為分段函數(shù)}求
已知函數(shù),f(x)= 4-x^2(x>0),2(x=0),1-2x(x<0){此函數(shù)為分段函數(shù)}求
當(dāng)-4≤x<3時(shí),函數(shù)f(X)的值域?
優(yōu)質(zhì)解答
分段函數(shù)的值域:分區(qū)間來(lái)求,然后求并集
-4當(dāng)x=0時(shí),f(x)=2,
當(dāng)0綜上可知,當(dāng)-4≤x<3時(shí),函數(shù)f(X)的值域?yàn)?-12,1)U{2}當(dāng)-4≤x<0時(shí),應(yīng)該取1-2x吧,還有老師講的答案是5<y<9啊!是,我看錯(cuò)你的分段函數(shù)了,不好意思了。-4