Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Prove that
∫
0
x
{
∫
0
u
f
(
t
)
d
t
}
d
u
=
∫
0
x
(
x
−
u
)
f
(
u
)
d
u
.
\int_{0}^{x} \left\{ \int_{0}^{u} f(t)\,dt \right\} du = \int_{0}^{x} (x - u) f(u)\,du.
∫
0
x
{
∫
0
u
f
(
t
)
d
t
}
d
u
=
∫
0
x
(
x
−
u
)
f
(
u
)
d
u
.
Browse the problem library