# Tagged Questions

Homework questions are welcome as long as they are asked honestly, explain the problem, and show sufficient effort. Please do not use this as the only tag for a question. For the answers on homework questions, helpful hints or instructions are preferred to a complete solution. Please do not add ...

1answer
117 views

### Let $x = 2441921$. Factor $x$ into a product of primes.

Let $x = 2441921$. Factor $x$ into a product of primes. I found that: $1519^2 −x=−134560= −2^5 ·5 · 29^2$ and $1541^2 −x=−67240= −2^3 · 5 · 41^2$. I am trying to figure out what to do from here. ...
3answers
58 views

### Solve the equation: $\frac{z}{z-5}+\frac{1}{3}=-\frac{5}{5-z}$

Solve the equation: $\frac{z}{z-5}+\frac{1}{3}=-\frac{5}{5-z}$ First $z$ cannot be equal to $5$. First, I multiplied $z$ with $3$, $1$ with $z-5$ and $-5$ with both. Eliminating the denominators ...
3answers
42 views

### Dividing line segments with ratios vs. fractions [on hold]

I know that 2:3 is actually 2/3. So when you split a line segment by a ratio, you would add 2 and 3 to get a fraction of 2/5 that will be used to solve the problem. I can't really seem to find much ...
1answer
36 views

### Determining the infinite limit of a Riemann' sum

I need to evaluate the following $f(x)=x^2 + 2x - 5$, on $[1,4]$, by using the riemans sum and limiting it to infinity. I have set up everything $\Delta x=\frac{3}{n}$. $x_i=1+\frac{3i}{n}$, I would ...
1answer
37 views

0answers
33 views

### What is the linear combination of B?

I have a problem where I am finding $A^n$B where B=$[3,1,1]^t$. I know the steps in solving, but I do not remember how to find linear combination. I do not see it. There has to be a way to calculate ...
2answers
432 views

### The sum of two irrational square roots

This is very similar to this question, but I was wondering if there was a simpler proof. In particular, a proof that would prove that $\sqrt{x}+\sqrt{y}$ is an irrational number if both $\sqrt{x}$ ...
4answers
80 views

### How to compute 1/7 in base 8?

This is probably a very basic question but nonetheless I choked when I got in a math for programmers class. I was taught how to convert from base to base but I have no idea how to convert fractions to ...
3answers
220 views

2answers
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### Geometric meaning of results obtained in (a) and (b)

The task: Plot the function $\sqrt{1-x^2}$. What does it look like? What is the geometric meaning of the results you obtained in (a) and (b)? Can anybody help me with geometric mean? I can't ...
3answers
72 views