# What is this technique?

• I
From website https://math.stackexchange.com/questions/43203/integrate-int-fracz-rur2-z2-2rzu3-2-du

#### Attachments

• 28308619_1616503981764221_1883123623_n.png
32.6 KB · Views: 546

QuantumQuest
Gold Member
It's differentiation under the integral sign. See Wikipedia here.

It's differentiation under the integral sign. See Wikipedia here.
What is the benefit of it?

QuantumQuest