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Curious
  • Member for 9 years, 10 months
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5 votes

How can I prove the last digit of $(2^{121985292}-1)$ is $5$

4 votes

Why use neighborhood to define boundary? Not open ball?

3 votes

limit $\lim_{n\to \infty }\sum_{k=1}^{n}\frac{k}{k^2+n^2}$

3 votes

Is there a more systematic approach to solving this inequality?

3 votes

Proving a group with five elements is abelian (commutative)

3 votes
Accepted

How many ways can a number be written as a sum of two non negative integers?

3 votes
Accepted

Conceptual question on differentiation in calculus?

3 votes

Permutation and Combination 3

2 votes
Accepted

A and B likely to contradict each other in stating same fact?

2 votes
Accepted

rank of a matrix?

2 votes
Accepted

root of unity, prove relationship

2 votes

Rearrange letters in "ENGINE" so no letter appears next to itself

1 vote

What is the remainder when $1995! -1$ is divided by $100 * 101$?

1 vote

Find number of five digit natural numbers using digits $1,2,3,4,5$ such that consecutive digits do not appear together

1 vote

Limits using L'Hopital's rule $\lim_{x\to0^+} (x^{x^x-1})$

1 vote
Accepted

The probability of remaining cups of soda in an urn according to a uniform distribution

1 vote

probability of having 2 boys given at least 1 is a boy

1 vote
Accepted

How to prove that $\lim_{x\to \pi/2} (\tan x)^{\tan2x}=1$

1 vote

How to solve $\lim\limits_{x\to 0} \frac{x - \tan(x)}{x^2}$ Without L'Hospital's Rule?

1 vote

Conceptual question on differentiation in calculus?

1 vote

inner product question <,>

1 vote
Accepted

Prove that $\sum_{i=1}^{i=n} \frac{1}{i(n+1-i)} \le1$

1 vote

Prove that $\sum_{i=1}^{i=n} \frac{1}{i(n+1-i)} \le1$

1 vote

Why does this sum converge?

0 votes

2 Cards are drawn from a deck of cards. What is the probability of having drawn a black card OR an ace?

0 votes

Proving that rational numbers are dense

0 votes

Open cover for $(0, 1)$

0 votes

counting measure on naturals not equal to limit

0 votes

How can I show that $\lim_{n\to\infty} 2^n \left( \frac{n}{n+1} \right ) ^{n^2} = 0$?

0 votes

Letter permutation MISSISISPPI, S come before any I