Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Problem
Problem
In a triangle
A
B
C
ABC
A
B
C
,
(
a
+
b
+
c
)
(
b
+
c
−
a
)
=
λ
b
c
(a + b + c)(b + c - a) = \lambda bc
(
a
+
b
+
c
)
(
b
+
c
−
a
)
=
λb
c
if a.
λ
<
0
\lambda < 0
λ
<
0
b.
λ
>
6
\lambda > 6
λ
>
6
c.
0
<
λ
<
4
0 < \lambda < 4
0
<
λ
<
4
d.
λ
>
4
\lambda > 4
λ
>
4
Browse the problem library