I am currently studying calculus on an open learning basis and was wondering if someone could take a look at these questions and answers I have posted and feed back on my method of working out etc. I am pretty sure these answers are correct but would appreciate any comments.

Question 1:

Obtain for the following expression.

so This is the 1st part.

I then differentiate the inner part of the function so:-

differentiates to 5. This is the the 2nd part.

I then multiply the 1st by the 2nd to get

so

Question 2:

Obtain for the following expression.

so This is the 1st part.

I then differentiate the inner part of the function so:-

differentiates to -2. This is the the 2nd part.

I then multiply the 1st by the 2nd to get

so

Question 3:

Obtain for the following expression.

which is

I then differentiate this to get This is the 1st part:

differentiates to -0.6. This is the the 2nd part.

I then multiply the 1st by the 2nd to get

so

Question 4:

Obtain for the following expression.

so This is the 1st part.

I then differentiate the inner part of the function so:-

differentiates to 3. This is the the 2nd part.

I then multiply the 1st by the 2nd to get

so

As I said at the beginning I am pretty sure I am 100% correct and I agree these are relatively simple questions from a calculus point of view but being new to this subject I was just wondering if someone could make comment please.

Thanks

Derek.