## roselin Group Title find the derivative of u=5x+1/2 sqrt of x one year ago one year ago

1. zepdrix Group Title

Rewrite the sqrt as a fractional exponent. From there, it will be easier to see what you need to do.( Psssst! Power rule!) $\large u=5x+\frac{ 1 }{ 2 } x^{1/2}$

2. roselin Group Title

okay,

3. roselin Group Title

after that, just plug in the values for each?

4. zepdrix Group Title

Hmm you shouldn't need to "plug" anything in, do you know how to take a derivative using the power rule?

5. roselin Group Title

i got 5/ x^1/2

6. roselin Group Title

yeah

7. zepdrix Group Title

Hmmm

8. roselin Group Title

nx^ n-1?

9. roselin Group Title

sorry

10. zepdrix Group Title

yes good, that's the derivative of x^n :)

11. zepdrix Group Title

|dw:1351713737221:dw| Understand what we did there? :O

12. roselin Group Title

yeah,

13. roselin Group Title

do i have to simplify it further?

14. roselin Group Title

or just leave it like that?

15. zepdrix Group Title

|dw:1351714227487:dw| You can write it like this if you want. But it's not a big deal. The first form of the answer we came up with is fine.

16. roselin Group Title

okay, thanks