Derivative of
The derivative of is .
f(x) =
Type any function of x; the derivative is computed symbolically in your browser.
How to work it out
- 1
We differentiate with respect to x. The rule that applies is the chain rule.
- 2
Chain rule: differentiate the outer function, keep the inside, then multiply by the derivative of the inside. The inside is .
- 3
The outer function is ; its derivative evaluated at g(x), times g'(x):
- 4
Simplify:
- 5
Differentiating once more gives the second derivative, which tells you about curvature:
LaTeX source of the formulas on this page
\[ \frac{d}{dx}\left[e^{x^{3}}\right] = e^{x^{3}} 3 x^{2} \]
\[ f(x) = e^{x^{3}} \]
\[ g(x) = x^{3},\quad g'(x) = 3 x^{2} \]
\[ f'(x) = \left[e^{u}\right]_{u=g(x)} \cdot g'(x) \]
\[ f'(x) = e^{x^{3}} 3 x^{2} \]
\[ f''(x) = e^{x^{3}} 3 x^{2} 3 x^{2} + e^{x^{3}} 6 x \]Values of f and f' for exp()
| x | f(x) | f'(x) |
|---|---|---|
| -2 | 0.00033546263 | 0.0040255515 |
| -1 | 0.36787944 | 1.1036383 |
| 0.5 | 1.1331485 | 0.84986134 |
| 1 | 2.7182818 | 8.1548455 |
| 2 | 2980.958 | 35771.496 |
| 3 | 532048240000 | 14365302000000 |
Questions
What is the derivative of exp()?
The derivative of is .
What is the second derivative of exp()?
exp() * 3 * * 3 * + exp() * 6x.
Which rule do you use for exp()?
The chain rule.
What is the slope of exp() at x = 1?
8.1548455.