-1<=X<=0时,-x²+2x-k=0;①
0<=X<=3时,x²-2x-k=0; ②
对称轴均为x=1,则①式顶多一解,有三个不等实根,则必有:△1>0,△2>0,①式x=-1时,-x²+2x-k<=0, ②式x=0,3时x²-2x-k>=0,(①开口向下,在[-1,0]上减函数,则x=-1时值<=0;②式同样分析)
得k∈(-...
-1<=X<=0时,-x²+2x-k=0;①
0<=X<=3时,x²-2x-k=0; ②
对称轴均为x=1,则①式顶多一解,有三个不等实根,则必有:△1>0,△2>0,①式x=-1时,-x²+2x-k<=0, ②式x=0,3时x²-2x-k>=0,(①开口向下,在[-1,0]上减函数,则x=-1时值<=0;②式同样分析)
得k∈(-...