Optimizing Derivatives of Logarithmic Functions: How to Find the Derivative of Log Base b of x

Derivative of log base b of x

1/ x ln(b)

The derivative of log base b of x, where b is a positive constant and x is a positive real number, can be found using logarithmic differentiation.

Let y = log_b x. Taking the natural logarithm of both sides, we have:

ln(y) = ln(log_b x)

Using the chain rule and the fact that the derivative of ln(x) is 1/x, we can take the derivative of both sides with respect to x:

1/y * dy/dx = 1/(x *ln(b))

Solving for dy/dx, we get:

dy/dx = (1/y) * (1/(x*ln(b)))

Using the logarithmic identity that y = log_b x, we can substitute back to get the final derivative:

dy/dx = (1/(x * ln(b) * log_b x))

Therefore, the derivative of log base b of x is (1/(x * ln(b) * log_b x)).

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