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Aleksandr Hovhannisyan's user avatar
Aleksandr Hovhannisyan's user avatar
Aleksandr Hovhannisyan's user avatar
Aleksandr Hovhannisyan
  • Member for 8 years, 6 months
  • Last seen more than a month ago
1 vote
Accepted

Using direct proof, prove that $2^0 + 2^1 + 2^2 + \dots + 2^n = 2^{n+1} - 1$ (no summation, theorems, or induction allowed)

0 votes

Sieve of Eratosthenes : why $\sqrt n$ work?

0 votes

Prime of form $n^2-4$

0 votes

Show that $\gcd(a, 0)$ exists and equals $|a|$ for all $a$ in $\mathbb Z$

0 votes

Proof for parallelogram law of vector addition

0 votes

A particle is moving along $x$-axis whose position is varying with time according to x=-3t+$t^3$. The displacement from t=1 to t=3 is

0 votes

What is the relationship between modulo and $\log_2$ in this problem?

22 votes

Big-O Notation - Prove that $n^2 + 2n + 3$ is $\mathcal O(n^2)$

3 votes

Stars and bars with constraints

0 votes

How much should one pay, answer using expectation of random variable?

0 votes

Linear transformations: one-to-one mapping.

5 votes

Probability of getting at least 1 red or green ball

0 votes
Accepted

Finding the Taylor polynomial for f(x) = sin(x) at x = $\pi$