I have a Exam , Can you help?

[amirhossein]

Hi everybody, I have a Calculus exam today and I was wondering if you can help me or not. I think it's gonna be three questions in general. so I am going to post questions here when I got them, it would be so nice if you help me to solve them.
Thank you

 

[Steven G]

We do not solve problems for any students on this forum, especially for an exam.
We prefer to help the student solve their problems.