Tough questions MATHS

Question 1

In this document, https://docs.google.com/document/d/1NiJDqY5tnmSgLupi-7NXkIZgb6KxyY1UeXLb63Lq1js/edit
Have a look at number 20

Answer 1

Answer - D

Explanation on the document

Question 2

In this document,number 45

https://docs.google.com/document/d/1N-iPQu-qLPk9402DQ1C7qSctDNVIZIvzqSphpJ5B-9s/edit