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Workaholic's user avatar
Workaholic's user avatar
Workaholic
  • Member for 9 years, 4 months
  • Last seen more than 6 years ago
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38 votes
Accepted

Solve $x^4+3x^3+6x+4=0$... easier way?

34 votes
Accepted

Why are linear functions linear?

17 votes

A generalized derivative

17 votes

Vector spaces - Multiplying by zero scalar yields zero vector

17 votes

How does Cramer's rule work?

14 votes
Accepted

Does $\frac{1} { ax+b}$ apply when $b$ equals $0$

14 votes
Accepted

Who found the expression $n^2 - n + 41 $ for generating prime numbers?

14 votes

why does integration by parts give a different answer

12 votes
Accepted

Find $\sin^3 a + \cos^3 a$, if $\sin a + \cos a$ is known

10 votes
Accepted

Why does $\frac{a-x}{x-a} = -1$

10 votes

How do you solve for x in this equation? $4^x=2^x+6$

9 votes
Accepted

Is differentiation of zero, zero?

9 votes
Accepted

Does associativity imply closure?

8 votes
Accepted

Is there any closed form solution for a function $f$ on $\mathbb R$ satisfying $f(t+s)=f(t)f(s)$

8 votes

Understanding the periodicity of a complex exponential function

8 votes

Is this point on the unit circle?

8 votes
Accepted

Is the function $f(x) = tan(x)$ odd, even, or neither?

7 votes
Accepted

Writing a piecewise function for $f(x) = \mid x+3\mid -\mid x-1\mid $

6 votes

what is the integral $\int_{-\pi/3}^{\pi/3} \tan (\theta)$?

6 votes
Accepted

Calculate $\sin{55}-\sin{19}+\sin{53}-\sin{17}$ without calculator

6 votes

How to find $\int_{-1}^1 \frac{\cos x}{a^x+1}\mathrm dx$

6 votes
Accepted

Direct proof for $\left (1+ \frac11\right )\left(1+ \frac12\right )\left(1+ \frac13\right )\cdots\left(1+ \frac1n \right) = n+1$

6 votes
Accepted

Estimating partial sums $\sum_{n = 1}^m \frac{1}{\sqrt{n}}$

6 votes

How to solve the following equation involving an exponential function

6 votes
Accepted

Proof that Limit of the Log is the Log of the Limit

5 votes

My proof that sum of convergent sequences converges to sum of limits

5 votes
Accepted

Finding limits, one sided limits.

5 votes

Can someone provide the formal definition of the tangent line to a curve?

5 votes

If $x^{1/2}$ is the same as $ \sqrt[2] x$ then why $x^{1/3}$ is not equal to $\sqrt[3] x$?

5 votes

How to evaluate $ \lim_{x \to 1} \frac{e^{x-1}-1}{x^2-1} $

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