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minthao_2011
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1 vote
2 answers
1k views

How to find the complex number has least and greatest modul satisfying a given condition?

8 votes
1 answer
3k views

How to substitute the following conditions into an expression?

5 votes
4 answers
5k views

How to find the sum all even numbers of this sequence?

0 votes
1 answer
87 views

Find all values of the paramaters $m$ for which the equation has four roots smaller 2

3 votes
3 answers
366 views

How can I find the sum of the even digits of a number of all elements of a list?

-2 votes
1 answer
431 views

Perimeter and area are positive integers

1 vote
2 answers
234 views

How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?

4 votes
3 answers
1k views

How can I get the exact solution of this equation (inequality equation)?

4 votes
4 answers
235 views

How to get a list of pairs into the form $(x,y)$?

3 votes
3 answers
459 views

How to find the numbers $a$, $b$, $c$, $d$ of the function?

13 votes
4 answers
1k views

How can I find all values of $m$ such that my cubic equation has three different positive solutions?

9 votes
1 answer
284 views

$1 - \sqrt{5}$ $\in$ $\mathbf{R}$?

11 votes
5 answers
732 views

How to choose three points on the circle so that the triangle is not a right triangle?

14 votes
2 answers
1k views

How do I solve this equation?

3 votes
1 answer
267 views

How to convert the symbol $d$ in Integrate into $\mathrm{d}$?

4 votes
3 answers
1k views

How to find the minimum of this constrained expression?

6 votes
1 answer
2k views

How to solve this equation with integers as a solution?

1 vote
1 answer
445 views

How to delete duplicate solutions of this system of equations?

9 votes
3 answers
5k views

Finding the number of solutions to a diophantine equation

7 votes
3 answers
14k views

How to solve this system of equations?

11 votes
2 answers
2k views

How to solve a system of equations of the Vietnamese Mathematical Olympiad?

5 votes
1 answer
155 views

How to substitute $x$ in a expression $f(x)$ but not calculate the value of the $f(x)$ at the point $x$?

0 votes
2 answers
165 views

How to get special solutions of this system of equations?

3 votes
1 answer
2k views

How to solve this equation with positive integers as a solutions?

5 votes
2 answers
377 views

How to solve this combination equation?

6 votes
2 answers
5k views

How to determine the remaining sides given the three angles and one side of a triangle?

4 votes
1 answer
853 views

How to solve this exponential inequality?

5 votes
4 answers
6k views

How to solve this logarithmic equation?

6 votes
2 answers
1k views

How to receive the result of the integral $ \int\frac{1}{x}dx$ is $\ln|x|$?

1 vote
1 answer
153 views

How to find the values of $m$ so $A \cap B = \emptyset$ and $A \cup B = (-3,+\infty)$?