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How do you differentiate a^x?

The quick answer is that d/dx a^x = ln(a) * a^x. But why?

Well, let's go through the steps so we can understand why the formula works.

Firstly, a^x can be written as (e^(ln(a)))^x because e^(ln(z)) = z as the natural log (ln) is the inverse of e to the power. Then we can write it as e^(x * ln a) because (a^b)^c = a^(b*c). Then differentiating e^(x * ln a) = ln(a) * a^x!

Kian M. GCSE Maths tutor, A Level Maths tutor, GCSE Further Mathemati...

4 months ago

Answered by Kian, who has applied to tutor A Level Maths with MyTutor

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Osian S.

Degree: Mathematics (Masters) - Warwick University

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Kian M.

Degree: Computing (Bachelors) - Imperial College London University

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