Nikola Alfredi

Member for 4 years, 7 months
Last seen more than a month ago

India

Summary

Reputation

945

945
940
935

Mar
Jun
Sep
Dec

Top tag

combinatorics

Next privilege

1,000 Rep.

Create new tags

Badges

5

24

Newest

Popular Question

Next badge

169/300

Civic Duty

Answers

View all 23 answers

Score Activity Newest

6

Finding the range of $y =\frac{x^2+2x+4}{2x^2+4x+9}$ (and $y=\frac{\text{quadratic}}{\text{quadratic}}$ in general)

Dec 1, 2021

4

Number of ways to divide $160$ into three parts

Mar 14, 2020

3

How many different ways are there to order the letters A,B,C,D,E,G,H in a line in such a way the letter B be always between A and D?

Sep 2, 2020

3

Calculating $\int \frac{x}{\sqrt{x^{2}-36}} \, {\rm d} x$

Mar 4, 2021

3

The inequality $(ae^{bx} - be^{ax} - (a -b)) > 0$

Mar 13, 2022

Questions

View all 22 questions

Score Activity Newest Views

7

Infinite summation : $\displaystyle S= \sum_{r=0}^{\infty} \frac{\cos (2xr)}{4r^2 - 1}$

Mar 11, 2022

6

Solution to the $\displaystyle \phi'' + 4\phi' + 3\phi = x \cos {3x}. $

Aug 6, 2021

5

7 digit number combinations

Feb 27, 2020

5

Computing : $\displaystyle \int \frac {m + n\cos (x-x_0) }{ [a+b\cos (x-x_0)]^{3/2} } \mathrm{d}x $ with integration of $E$ and $F$

Mar 23, 2022

3

Number of subsets of $X = $ { $ 1,11,21,31,41,..., 551 $ } such that no two elements sum to $552.$

Mar 4, 2020

Tags

View all 49 tags

combinatorics

14

Score

18

posts

calculus

10

Score

9

posts

inequality

10

Score

7

posts

functions

9

Score

2

posts

combinations

6

Score

2

posts

Reputation

This user has no recent positive reputation changes.

Badges

View all badges

This user doesn’t have any gold badges yet.

5

silver badges

Constituent

Nov 16, 2021
Yearling

× 4

May 4

24

bronze badges

Vox Populi

Aug 6, 2021
Suffrage

Aug 6, 2021
Explainer

Dec 2, 2021

Accounts

View all 13 accounts

945
5
24

246
1
12

141
7

Meta Stack Exchange

101
1

101
2

Active bounties (0)

Active Offered Earned

This user has no active bounties

Votes cast

155

upvotes

14

downvotes

91

question votes

78

answer votes