Question

The set of values of k for which x²+(4k-1)x+9>0 for all values of x belongs to real is
1) [5/4,7/4] 2) [-5/4, 7/4]
3) (-5/4,7/4) 4) (5/4,7/4)
please say correct answer and please check option brackets
each bracket represent one meaning ​

Answer 1

Answer:

values of x belongs to real is

1) [5/4,7/4] 2) [-5/4, 7/4]

3) (-5/4,7/4) 4) (5/4,7/4)

please say correct answer and please check option brackets