Galc127's user avatar
Galc127's user avatar
Galc127's user avatar
Galc127
  • Member for 10 years, 3 months
  • Last seen more than a month ago
  • Tel Aviv-Yafo, Israel
12 votes

the converse of Pythagoras Theorem

7 votes

What do we actually prove using induction theorem?

5 votes
Accepted

The value of the definite integral

5 votes

Calculating integral of function with square root

5 votes
Accepted

Solving $y^2 - yx - y + x = 0$ for $y$?

5 votes

Find the largest even number which cannot be expressed as the sum of two odd composite numbers.

4 votes
Accepted

For what values of $a,b,c$ will $ax^2+bx+c \geq 0$ hold $\forall x \in \mathbb{R}$?

4 votes

How can one show the following quotient has a limit of $1$?

4 votes
Accepted

How to factorize $2x^2-9x+9$ by completing the square?

4 votes

Prove by mathematical induction.

4 votes
Accepted

What is the dimension for the following basis?

3 votes
Accepted

Find Eigen values and eigen vectors

3 votes
Accepted

How to evaluate $\displaystyle \int_{0}^{\infty }\frac{\cos x}{\left ( x^2+a^{2} \right )\left ( x^2+b^{2} \right )}~\mathrm{d}x$

3 votes
Accepted

Find Max Of $M=|z^{3}-z+2|$

3 votes
Accepted

Is $\frac{1}{\lfloor \frac{a}{b} \rfloor}=\lceil \frac{b}{a} \rceil$??

3 votes
Accepted

Proof the triangle is rectangular if the sides and half the circumference form a series

3 votes
Accepted

How many ways can you partition a set with $2n$ elements into two sets?

2 votes

What is the series of numbers, where each number is a triangular, square, and hexagonal number?

2 votes

How to prove this exact Differential Equation is exact?

2 votes

Product of roots of $ax^2 + (a+3)x + a-3 = 0$ when these are positive integers

2 votes

Solving the two ODEs $\frac {dv}{dt}+\frac va=F$ and $c-\frac 12 \frac {du}{dt}-\frac ua=0$

2 votes
Accepted

Show that λ +c is an eigenvalue of B

2 votes
Accepted

Solving $\cos(2x) + \cos(x) = \cos\left(\frac{3}{2}x\right)$

2 votes
Accepted

Proof formula with induction

2 votes
Accepted

Prove $x^{2 \over 3} \ln(x)$ is uniformly continious

2 votes

simplify $3x^{3/2}-9^{1/2}+6^{-1/2}$

2 votes

What is the number of nonnegative solutions of a linear equation?

2 votes

Find $\lim_{x\to\infty} \frac{e^{2x}-1}{e^{2x}+1}$ and $\lim_{x\to-\infty} \frac{e^{2x}-1}{e^{2x}+1}$

2 votes

Finding the limit of: $\lim_{x\rightarrow +\infty}\left(x\arctan x-x\dfrac{\pi}{2}\right)$

2 votes
Accepted

Does $\sum_{n=1}^{\infty}\frac{\cos\left(\frac{n\pi}{2}\right)}{\sqrt{n}}$ converge?