Find the partial derivative 
for the function 
.
Definitions:
Point-of-sale Terminal
An electronic device used to process sales transactions at retail locations, accepting payment from customers in various forms.
Voice Recognition
A technology that identifies and interprets human speech, allowing computers and devices to accept and execute voice commands.
Memory Capacity
The amount of data or information that can be stored in a device's memory system.
KB
Kilobyte, a unit of digital information storage equal to 1,024 bytes.
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