Question

1.若方程 2KX(X-2)-X(X+3)+2K+5=0有实数根,则k的最小整数数是_________

Answer 1

原方程化为:

(2K+1)X^2-(4K+3)X+2K+5=0,

(4K+3)^2-4(2K+1)(2K+5)>=0

K>=11/60,

则k的最小整数数是__1_______