I want to know what does $|a| = |b$| is equal to. I think it's equal to $a = \pm b$. Please tell me if I'm right or if I'm wrong.

For independent variables we have $E[XY]=E[X]E[Y]$. Now, since I could not find a statement that the converse is also true, I suspect that there are examp...

Is it possible or not to calculate remainder through use of Casio fx-991 ES Calculator. If possible then how for example :- I have to calculate remainder ...

The region $D$ is bounded below by $z=2\sqrt{x^2+y^2}$ and above by $x^2+y^2+z^2=5$ My task is to calculate $$\iiint_D e^{{(x^2+y^2+z^2)}^{3/2}}dV.$$ I tr...

Is it true that the exponential of a Jordan block is an upper triangular matrix? I tried two examples and got just diagonal matrices which may be a coinci...

I have read this question. I am now stuck with the difference between "if and only if" and "only if". Please help me out. Thanks

I am trying to figure out the Taylor polynomial of degree $3$, denoted as $T_3(x)$, for $f(x) = xe^{-2x}$. I am a bit confused about what form the general...

I need to finding derivative of $\sqrt[3]{x}$ using only limits So following tip from yahoo answers: I multiplied top and bottom by conjugate of numerator...

How would you differentiate the function $(-1)^x$ w.r.t. $x$. Is the formula for $a^x$ valid here? Wolfram says that the derivative of $(-1)^x$ is $iπ(-1)...

I was learning about the Trapezoid from Paul's Online Notes (a great resource!). He mentions that "all function evaluations, with the exceptions of t...