find the value of x and the value of y when dy/dx = 0
ok, so i've found dy/dx to be
but i'm having trouble evaluating for dy/dx = 0.
I get to but am unsure of how to solve this. (also have i multiplied through by x^2 properly?)
Raise both sides to the power 2/5 .
EDIT: And yeah your rearranging and multiplication of x^2 is fine.
i get x = 4, is that correct?
You know from rules of indices that x^5/2 is the square root of x to the power of 5 so take the 5th root of 32 and you have the square root of x
ahh i get that now, thank you
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