How can u differentiate that :
c= 100,000* (x^2 + 25 )^0.5 + 75,000(8-x)
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Originally Posted by Pulock2009 dc/dx=100,000*0.5*(x^2+25)^(-0.5).2.x+75,000(-1)
thnx , that is what I got
but I'm confused how to get the critical value of x
how can that equation be simplified in order to get the value of x
dc/dx=0 and solve ,friend!!!
Originally Posted by Pulock2009 dc/dx=0 and solve ,friend!!! the first part is raised to the power 0.5 which is kind of problem for me
any suggestion ?
A power of 0.5 is the same as taking a square root. So:
If it is negative:
Does that help?
Originally Posted by zisi the first part is raised to the power 0.5 which is kind of problem for me
any suggestion ? Surely you know that the derivative of is . That's true for n any number. Even 0.5.
The derivative of is which, as drumist points out, could also be written .
However, if the original problem was given as then I would recommend writing the answer in the same way: .
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