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Deniz Tuna Yalçın
  • Member for 5 years
  • Last seen more than 3 years ago
  • İstanbul, Türkiye
4 votes

Solving these two equations

3 votes
Accepted

Number of solutions to $x_1 + \ldots + x_5 = 26$ for $x_k \leq 10$

3 votes

When is this integer a perfect square: $n^2 + 20n + 12$

1 vote

Finding the minimum value of $a^2+b^2+c^2$

1 vote

Find the value of $x$, for which the function $h(x) = \frac 1{(x-5)^2+4(x-5)+4}$ is undefined

1 vote

If $a+b+c=6$ and $a,b,c$ belongs to positive reals $\mathbb{R}^+$; then find the minimum value of $\frac{1}{a}+\frac{4}{b}+\frac{9}{c}$ .

1 vote
Accepted

We deal 52 cards to 4 players, what is the probability that each player has an ace?

1 vote

Explaining Proofs by Induction

1 vote

How to find $g^{-1}\circ h^{-1}$?

1 vote

Find all primes $p$ such that $p+1$ is a perfect square.

1 vote

Why are the formulas for finding area for a square vs. a rectangle different?

0 votes

Proof that $ 2\sqrt{x_1x_2} \le x_1+x_2 $

0 votes

How to find probability for this situation?

0 votes

Inclusion–exclusion principle

0 votes

for all positive integers $n$, $n$ is even iff $3n^2+8$ is even

0 votes

How to prove $\sum_{k=1}^n(2k)^2 = \frac{2n(n+1)(2n+1)}{3}$ using mathematical induction?

0 votes

$A \cap(A \cup B) = A$ for all sets $A$ and $B$

0 votes

Find value of $\sum\limits_{k=0}^{10}{(-1)^k C(10,k)/(2^k)}$

0 votes

How many ordered pairs of integers satisfy the equation $\frac{7}{x}+\frac{3}{y}=\frac{1}{4}$?

0 votes

Solving Simultaneous Equations with Complex Numbers

0 votes

Probability of a target being hit

0 votes

Five people get on the elevator that stops at five floors. In how many ways they can get off?

0 votes

Solve this with CBS: minimum value of $ 1/x + 4/y + 9/z $ with $x+y+z=1$

0 votes

How to prove $a^2 + b^2 + c^2 \ge ab + bc + ca$?

0 votes

Expansion and simplification of a function f(x) with a binomial of the form (${1-x^n}$)

0 votes

Find missing entires $f \circ g(x)$ calculus composite functions