Example 1.23
Convert the following multiple integral to a single integral:
0x 0x 0x (x − t)dtdtdt. (1.135)
Using the corollary (1.130) we obtain
x x x 1 x 3
(x − t)dtdtdt = (x − t) u(t)dt. (1.136)
0 0 0 3! 0
Example 1.24
Convert the following multiple integral to a single integral:
x x1 (x − t)u(x )dtdx . (1.137)
1 1
0 0
Using the corollary (1.130) we obtain
x x1 1 x 2
(x − t)u(x )dtdx = (x − t) u(t)dt. (1.138)
1 1
0 0 2 0