k为怎样的值时,函数f(x)=(kx²+4x+k+2)^1\2+(x²-kx+1)°的定义域是R

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$k为怎样的值时,函数f(x)=(kx²+4x+k+2)^1\2+(x²-kx+1)°的定义域是R$

k为怎样的值时,函数f(x)=(kx²+4x+k+2)^1\2+(x²-kx+1)°的定义域是R
k为怎样的值时,函数f(x)=(kx²+4x+k+2)^1\2+(x²-kx+1)°的定义域是R

k为怎样的值时,函数f(x)=(kx²+4x+k+2)^1\2+(x²-kx+1)°的定义域是R
根据题意得
k>0
△1=16-4k(k+2)