Given the function f (x) = (K-2) x + (4-3k), when x ∈ [- 1,1], the image of function f (x) is always above the x-axis, then the value range of K is____

Given the function f (x) = (K-2) x + (4-3k), when x ∈ [- 1,1], the image of function f (x) is always above the x-axis, then the value range of K is____

This is a linear function, as long as the function values at the end of the interval are greater than 0
That is: F (- 1) > 0, f (1) > 0
If f (- 1) = 2-k + 4-3k = - 4K + 6 > 0, then: K0, then: K