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zepdrixBest ResponseYou've already chosen the best response.1
Rewrite the sqrt as a fractional exponent. From there, it will be easier to see what you need to do.( Psssst! Power rule!) \[\large u=5x+\frac{ 1 }{ 2 } x^{1/2}\]
 one year ago

roselinBest ResponseYou've already chosen the best response.0
after that, just plug in the values for each?
 one year ago

zepdrixBest ResponseYou've already chosen the best response.1
Hmm you shouldn't need to "plug" anything in, do you know how to take a derivative using the power rule?
 one year ago

zepdrixBest ResponseYou've already chosen the best response.1
yes good, that's the derivative of x^n :)
 one year ago

zepdrixBest ResponseYou've already chosen the best response.1
dw:1351713737221:dw Understand what we did there? :O
 one year ago

roselinBest ResponseYou've already chosen the best response.0
do i have to simplify it further?
 one year ago

roselinBest ResponseYou've already chosen the best response.0
or just leave it like that?
 one year ago

zepdrixBest ResponseYou've already chosen the best response.1
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.
 one year ago
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