How to find the derivative of sqrt(x) from first principles?
Graphical explanation leading to the expression that we need to develop (Lim(a->0) (sqrt(x+a) - sqrt(a))/(a). Then we need to understand how to rearrange a fraction involving square roots (multiplication by sqrt(a+x) + sqrt(a) on the nominator and denominator). Calculation of limits to get 1/2sqrt(x).
OD
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