There is a problem in the Differentiation of $e^x$ from the first principles.
100004
Differentiating $e^x$ from first principles using limits.
27738
Gradient of $a^T X b$ with respect to $X$
153816
Real Roots and Differentiation
65659
Partial derivative paradox
17440
Differentiation using first principles with rational powers
49444
Why isn't $e^{2\pi xi}=1$ true for all $x$?
107290
proof of product rule of derivatives using first principle?
85623
Proof of continuity implied by differentiability
128795
$n$th derivative of $e^x \sin x$
105767
derivative under integral intuition
83022
Proof of this fairly obscure differentiation trick?
141540
What is wrong with the following "proof" that $e=1$?
115635
Differentiability of antiderivative and continuity of derivative
34368
Problem when integrating $e^x / x$.
90287
How to derive $[x_i, F(\vec p)] = i \hbar \frac {\partial F(\vec p)}{\partial p_i}$
139419
Problem on the domain of the solution of a differential equation
131424
which of the following is NOT a possible value of $(e^{f})''(0)$??