分段函数f(x)=1-cos^2x⼀x^2,x=0,f(0),x=0 若f(x)在x=0连续,则f

分段函数f(x)=1-cos^2x/x^2,x=0,f(0),x=0 若f(x)在x=0连续,则f(0)=
2025-06-23 03:03:12
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