Derivative questions , need step and answer -1

[chiazw601uum]

 

[Deleted member 4993]

View attachment 23939

You have posted 4 very different series of problems with marking scheme - but have not shown any work/thought towards solution of the problem.

Are these problems from an exam that you are supposed to pass? For us to help you - you need to tell us where do we need to start.

 

[chiazw601uum]

You have posted 4 very different series of problems with marking scheme - but have not shown any work/thought towards solution of the problem.

Are these problems from an exam that you are supposed to pass? For us to help you - you need to tell us where do we need to start.

i did already but I want to check the answer to confirm the answer ，this is my selfsolution