User vidhan

10 votes

Accepted

Finding kernel and range of a linear transformation

answered May 31, 2015 at 1:23

8 votes

Compute this sum: $\sum_{k=0}^{n} k \binom{n}{k}$?

answered Sep 23, 2015 at 10:22

5 votes

Find an acute angle $\gamma$ such that $\sin \gamma + \cos \gamma= \sqrt{2}$

answered May 29, 2015 at 19:54

4 votes

What is $\lim_{x\to\infty}\left(\sin{\frac 1x}+\cos{\frac 1x}\right)^x$?

answered Jun 3, 2015 at 17:27

4 votes

Understanding the difference between Span and Basis

answered May 25, 2015 at 19:26

3 votes

What is the integral, $\int\frac{dx}{x + \sqrt{1-x²}}\ $?

answered May 27, 2015 at 6:11

3 votes

Rolling 1 die 5 times

answered May 27, 2015 at 17:08

2 votes

Accepted

Find the 50th word of all permutations of word AGAIN ,when arranged accord to dictionary

answered Jun 2, 2015 at 14:55

2 votes

Solve this equation: $(x+2)(\sqrt{2x+3}-2\sqrt{x+1})+\sqrt{2x^2+5x+3}=1$

answered May 27, 2015 at 4:42

2 votes

Calculate the limit $\lim_{h\to 0} (1+ 2h)^\frac{1}{h}$

answered May 31, 2015 at 1:35

2 votes

SAT math problem about solute and solution

answered May 31, 2015 at 2:23

2 votes

Accepted

Finding a basis for the nullspace

answered May 31, 2015 at 10:43

2 votes

Accepted

Determining how many combinations there are when every item has a pair it can't exist with.

answered May 26, 2015 at 21:06

2 votes

Gradient of a function

answered May 18, 2015 at 9:22

1 vote

Values of a for which equation $\log_ax = \lvert x+1 \rvert + \lvert x-5 \rvert$ has a unique solution

answered May 24, 2015 at 21:51

1 vote

Finding a nullspace of a matrix - what should I do after finding equations?

answered May 24, 2015 at 23:44

1 vote

Find the equation of line in new co-ordinate system.

answered May 27, 2015 at 0:09

1 vote

Proving a differential equation is a circle

answered May 26, 2015 at 21:01

1 vote

Why $ \sum_{k=0}^{\infty} q^k $ sum is $ \frac{1}{1-q}$ when $|q| < 1$

answered May 31, 2015 at 11:17

1 vote

Limit of a Sine Function

answered May 25, 2015 at 17:03

1 vote

Evaluate $\displaystyle\int_\gamma\frac{1}{z^2 + 4}\:dz$ along the positively oriented circle $\lvert z - i \rvert = 2$

answered Sep 22, 2015 at 15:40

0 votes

Find the equations of the lines that pass through the point $(1,3)$ and are tangent to the circle $x^{2}+y^{2}=2$

answered Jun 15, 2015 at 16:27

0 votes

What does this circle look like?

answered May 28, 2015 at 19:55

0 votes

How to find the radius if two circles intersect in two distinct points?

answered May 27, 2015 at 16:29

0 votes

Prove $ \{(p \lor q) \land (p \implies r) \land (q \implies r) \} \implies r$ is a tautology using logical properties

answered Jun 2, 2015 at 7:50

0 votes

Chain rule and a function of a function of a function

answered May 25, 2015 at 0:28

0 votes

Calculate $\int_{0}^{3}{\left(\frac{12}{x^2 - 6x + 12}\right) \,dx}$

answered May 24, 2015 at 20:12

0 votes

Accepted

What is the probability of picking two black cards out of a pack of ten?

answered May 24, 2015 at 21:20

Stack Exchange Network

28 Answers

Finding kernel and range of a linear transformation

Compute this sum: $\sum_{k=0}^{n} k \binom{n}{k}$?

Find an acute angle $\gamma$ such that $\sin \gamma + \cos \gamma= \sqrt{2}$

What is $\lim_{x\to\infty}\left(\sin{\frac 1x}+\cos{\frac 1x}\right)^x$?

Understanding the difference between Span and Basis

What is the integral, $\int\frac{dx}{x + \sqrt{1-x²}}\ $?

Rolling 1 die 5 times

Find the 50th word of all permutations of word AGAIN ,when arranged accord to dictionary

Solve this equation: $(x+2)(\sqrt{2x+3}-2\sqrt{x+1})+\sqrt{2x^2+5x+3}=1$

Calculate the limit $\lim_{h\to 0} (1+ 2h)^\frac{1}{h}$

SAT math problem about solute and solution

Finding a basis for the nullspace

Determining how many combinations there are when every item has a pair it can't exist with.

Gradient of a function

Values of a for which equation $\log_ax = \lvert x+1 \rvert + \lvert x-5 \rvert$ has a unique solution

Finding a nullspace of a matrix - what should I do after finding equations?

Find the equation of line in new co-ordinate system.

Proving a differential equation is a circle

Why $ \sum_{k=0}^{\infty} q^k $ sum is $ \frac{1}{1-q}$ when $|q| < 1$

Limit of a Sine Function

Evaluate $\displaystyle\int_\gamma\frac{1}{z^2 + 4}\:dz$ along the positively oriented circle $\lvert z - i \rvert = 2$

Find the equations of the lines that pass through the point $(1,3)$ and are tangent to the circle $x^{2}+y^{2}=2$

What does this circle look like?

How to find the radius if two circles intersect in two distinct points?

Prove $ \{(p \lor q) \land (p \implies r) \land (q \implies r) \} \implies r$ is a tautology using logical properties

Chain rule and a function of a function of a function

Calculate $\int_{0}^{3}{\left(\frac{12}{x^2 - 6x + 12}\right) \,dx}$

What is the probability of picking two black cards out of a pack of ten?