# All Questions

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### Find this limit.

What is the limit as x->1 of (x^2)+2? I greatly appreciate your help and I will continue to type to satisfy the minimum length requirement please do not downvote this question as it will harm my ...
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The question is as follows: A man 6 feet tall walks at a rate of 5 feet per second away from a light that is 15 feet above the ground. When he is 10 feet from the base of the light, (a) at what rate ...
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### Calculating central elements of Universal Enveloping Algebras?

Simply put, how do I calculate (in general) the central elements of the UEA of some Lie algebra given some desired degree in the algebra generators? I know the so-called 'quadratic Casimir', of ...
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### Determining North-South Line Via Non-digital Watch Method: Discussion on Background Theory

Read this recently (page 9). What is the underlying geometric/celestial reason this works? What is the error to true north given this method? Is there a more accurate method using a watch and the sun? ...
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### confused on to leave in centimeters or convert to cubic centimeters

The volume $V$ of the cylinder is $65\pi \mathrm{cm}^3$. The height of the cylinder is $5$ centimeters. Use the formula $V = Bh$ to find the area of the base of the cylinder.
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### A ring satisfying a certain property is unital and has $ab = 1$ if $ba = 1$

Let $R$ be a finite ring satisfying for any $x \in R$ there exists $y \in R$ with $xyx = x$. Show that $R$ is unital and that if $ab = 1$, then $ba = 1$. Thoughts so far: If I can show that the ...
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### Why is Distribution Prioritized Over Combining?

In every algebra (or basic analysis) book that I've seen, three properties of real numbers are taken as axiomatic: commutativity, association, and distribution of multiplication over addition [a(b + ...
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### Number of possible non crossing paths on a grid of $m$ by $n$ size?

Given two points on 2 dimensional m by n grid, moving in units of 1 in either direction, how many non intersecting paths exist between the two points? in other words, with taxi cab metric, on a m by ...
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### Is it possible to define submanifold like this

Wikipedia offers the following definition for an (embedded) submanifold: An embedded submanifold (also called a regular submanifold), is an immersed submanifold for which the inclusion map is a ...
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### Smooth section of Hodge bundle ($F^pH^k$) can be viewed as a smooth form of type$F^pH^k(X,C)$ over$X$,$X--->B$ is an analytic family.

I think it is due to Kodaira. could someone explain the idea that Kodaira come up with this. maybe I shouldn't say"can be viewed as". I really mean the smooth form restrict on each fibre is just the ...
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### What are the loci of points z which satisfy the following relations?

a) |Z-Z1|=|Z-Z2| b) 0< Re(iZ)<1 c) |z|=ReZ+1 d) Im((Z-Z1)/(Z-Z2))=0 The professor did not explain loci in class and the text does not have any examples, so I am completely lost.
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### 93388•9546985339 [on hold]

This girl purchased 3 pounds of fruit. Her sister Evelyn purchased 1/10 the amount how much did each girl purchase?
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### An RMO level question

Find all the integer solutions to the equation: $x^3 +y^4 =7$