What is a mathematical expression indicating to a root of a quantity?

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0

sounds & other waves originate from any vibrating object