Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Problem
Problem
If
[
x
]
[x]
[
x
]
is the greatest integer less than or equal to
x
x
x
and
(
x
)
(x)
(
x
)
be the least integer greater than or equal to
x
x
x
and
[
x
]
2
+
(
x
)
2
>
25
[x]^2 + (x)^2 > 25
[
x
]
2
+
(
x
)
2
>
25
then
x
x
x
belongs to a.
[
3
,
4
]
[3, 4]
[
3
,
4
]
b.
(
−
∞
,
−
4
]
(-\infty, -4]
(
−
∞
,
−
4
]
c.
[
4
,
∞
)
[4, \infty)
[
4
,
∞
)
d.
(
−
∞
,
−
4
]
∪
[
4
,
∞
)
(-\infty, -4] \cup [4, \infty)
(
−
∞
,
−
4
]
∪
[
4
,
∞
)
Browse the problem library