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!

KM

Related Maths A Level answers

All answers ▸

What are logarithms and how do you manipulate them?


Integrate f(x): f(x) = (3x +2) / (x^2 - 5x +6)


A stone was thrown with velocity 20m/s at an angle of 30 degrees from a height h. The stone moves under gravity freely and reaches the floor 5s after thrown. a) Find H, b)the horizontal distance covered


Why is there always constant of integration when you evaluate an indefinite integral?