I need to find the derivative of y = sqrt(x-1), using the derivative formula f(x + h) - f(x) / h At the moment I have sqrt((x+h) -1) - sqrt(x-1) / h I tried multiplying the top and bottom by the conjugate but it didn't work.
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Originally Posted by steezin I need to find the derivative of y = sqrt(x-1), using the derivative formula f(x + h) - f(x) / h At the moment I have sqrt((x+h) -1) - sqrt(x-1) / h I tried multiplying the top and bottom by the conjugate but it didn't work. it didn't? ... now take the limit as
Thank you so much, turns out I mixed up one of the signs lol
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