Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Problem
Problem
If both the roots of the quadratic equation
x
2
−
2
k
x
+
k
2
+
k
−
5
=
0
x^2 - 2kx + k^2 + k - 5 = 0
x
2
−
2
k
x
+
k
2
+
k
−
5
=
0
are less than 5,
k
k
k
lies in the interval a.
(
−
∞
,
4
)
(-\infty, 4)
(
−
∞
,
4
)
b.
[
4
,
5
]
[4, 5]
[
4
,
5
]
c.
(
5
,
6
)
(5, 6)
(
5
,
6
)
d.
(
6
,
∞
)
(6, \infty)
(
6
,
∞
)
Browse the problem library