Happy e day!

This Quiz was uploaded on 7 February celebrating e day.

Only $7$ responses were recorded (Unfortunately). Question in order were:

Q1. The number e is also called as __(Euclid's number/ Euler's number/ Euler-Mascheroni number/ Archimedes number/ None of the above)

Q2. e is __ (an Irrational Number/ a Rational number/ a non real-complex number/ None of the above)

Q3. There exists non zero polynomial $p(x)$ with rational coefficients such that p(e)=0 (True/ False)

Q4. Note : ⌊ ⋅ ⌋ denotes the floor function. $\lfloor e\rfloor=?$

$Q5. \lim_{x\to\infty}\frac{1}{e}\times(1+x^{-1})^x=?$

$Q6. \sum_{n=0}^\infty\frac{(-1)^n}{n!}=?$

Q7. If $e^x=-1$, then $x=?$

$Q8.\lim_{h\to 0}\frac{e^{x+h}-e^x}{h}=?$

$Q9. \sum_{n=0}^\infty \frac{(-1)^nx^{2n}}{(2n)!}+ i\sum_{n=0}^\infty \frac{(-1)^nx^{2n+1}}{(2n+1)!},\space i^2=-1$

Q10. $f(x)=y$ is a straight line which is tangent to $y=e^x$ at $x=0.5$, find $f(x)$

$Q11. \forall n\in\mathbb{W}\frac{b_{n+1}}{b_n}=\frac{1}{a}-n,b_0=1$ $\lim_{a\to 0}\sum_{n=0}^\infty\frac{b_na^n}{n!}=?$

Q12. Note : $x(t):\mathbb{R}\to\mathbb{R}$ $a\frac{d^2x}{dt^2}+cx+d=0$ Find $x(t)$ if it satisfies above differential equation.

Solutions by Jeff Giff

Attempts