Ineed the number 7,8,9,10,11,12,13,13 i don’t understand

The important thing to remember is that the square root function is defined only for non-negative arguments. In other words, is only defined if , and thus has domain .

Some examples:

7. has domain , or

10. has domain , or

14. has domain , or , or

c.

step-by-step explanation:

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.