18(ii) and 21 . Please write correct answers .
Attachments:
![](https://hi-static.z-dn.net/files/d5e/d065cdf67f45ded3eff39fc33dff9943.jpg)
Answers
Answered by
1
Step-by-step explanation:
It is a formula and sometimes questions based on this formula are asked in exams . it is important
Attachments:
![](https://hi-static.z-dn.net/files/db8/519b7671e9e5f8d4880e48b9ddef2071.jpg)
Similar questions