What is The difference between d fundamental and derived units​

fundamental unit

The unit which is independent of any other units of physical quantities is called a fundamental units.

Derived unit

The unit which is expressed in two or more fundamental units is called derived units.

15.5

step-by-step explanation:

5

∑

n = 1

substitute n = 1, 2, 3, 4, 5 and sum the terms

= + + + 2² + 2³

= 0.5 + 1 + 2 + 4 + 8

= 15.5