Every example of a conditionally convergent series I can think of is alternating. Can someone find a non-alternating conditionally convergent series? Thanks.

Can I get help on how I can calculate this without a calculator? I know it's the inverse of $sin(1/2)$, but I'm still a little confused on how I...

Everywhere I read online people use trig substitution to solve it, but I want to understand why in the world this isn't the right way of doing it? $$...

I am finding the derivative of this equation, using the implicit differentiation in term of x. $$ {1\over x} + {1\over y} = 1$$ Here is what I did. $$ {1\...

The surface area of revolution of $\cos5\theta$ about the polar axis, using $$S=\int 2\pi y ds$$ Where, $$ds=\sqrt {r^2+\left(\frac{dr}{d\theta}\right)^2}...

Here is an excerpt from what I am reading. One can similarly define right $A$-modules. A convenient way to give a formal definition of right module is as ...

Could someone please explain the concept of switch variables (binary integer decision variables) in linear programming? This example has two alternative c...

I know the intuition behind the concept of cardinality (the number of elements of a given set) and the formal definition of sets with equal cardinalities,...

What will happen to the following matrix if the third row is multiplied by 3? 3 3 3 1 5 6 3 4 5 Also, in general, how does scaling a row of a square matri...

Can you please explain why $$ \sum_{k=1}^{\infty} \dfrac{k}{2^k} = \dfrac{1}{2} +\dfrac{ 2}{4} + \dfrac{3}{8}+ \dfrac{4}{16} +\dfrac{5}{32} + \dots = 2 $$...