How can u differentiate that : c= 100,000* (x^2 + 25 )^0.5 + 75,000(8-x) thnx
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dc/dx=100,000*0.5*(x^2+25)^(-0.5).2.x+75,000(-1)
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 thnx again
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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