# Calculus

**URL:** <https://forum.kirupa.com/t/calculus/188458>\
**Category:** random\
**Created:** [May 8, 2006, 4:55am UTC](https://forum.kirupa.com/t/calculus/188458 "2006-05-08T04:55:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![kdd](https://avatars.discourse-cdn.com/v4/letter/k/ecb155/32.png) [@kdd](https://forum.kirupa.com/u/kdd)\
**Post date:** [May 8, 2006, 4:55am UTC](https://forum.kirupa.com/t/calculus/188458/1 "2006-05-08T04:55:18Z")

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Can anyone please help me with #1 on this: [http://www.math.uh.edu/~parwani/problems.pdf](http://www.math.uh.edu/~parwani/problems.pdf)?

edit: have to use differential equation…  
Thanks. :beam:

i’ve no clue if i did is right or anything, but this is what i did:  
i took integral of the integral part. assume that result = K  
then (f(x))^2 = 100 + K  
f(x) = sqrt( 100 + K )  
took derivative of that…  
is that even close or i’m just making junk up?