Help with two calculus questions from file

[transgalactic]

i added a file
with two questions and how i treid to solve them

you can zoom on it.
it has a good resolution

please help


alse where can i find a good forum on
lenear algebra

 

[rocomath]

you're better off linking your picture, attachments can take a while to approve ...

 

[ranger]

alse where can i find a good forum on
lenear algebra

We have such a forum here at Physics Forums:
https://www.physicsforums.com/forumdisplay.php?f=75

 

[transgalactic]

where can i upload it
so i will link it??