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Questions Answered

frx:
Group Title
I have the function
\[f(x)=\frac{ \sin(x \pi ) }{ \sin(2x \pi) }\]
which is visually presented in the attached file.
…
 updated one year ago
 32 replies
 1 Medal
Mathematics

frx:
Group Title
1). \[\lim_{(x,y) \rightarrow (0,0)} \frac{ x ^{2}y ^{2} }{ x ^{4}+y ^{4} }\]
2). \[\lim_{(x,y) \rightarrow (0,0)} \frac{ x ^{2}y ^{2} }…
 updated one year ago
 10 replies
 No Medals Yet
Mathematics

frx:
Group Title
A particle moves around a circle x^2+y^2=25 at constant speed, making one revolution in 2 seconds. Find its acceleration when it is at (3,4)…
 updated one year ago
 5 replies
 1 Medal
Mathematics

frx:
Group Title
The vectors (1,2,3,4),(0,1,2,3),(0,0,1,2),(0,0,0,1) creates a basis in R^4. Decide the coordinates for the vector (1,1,1,1) in the given bas…
 updated one year ago
 16 replies
 2 Medals
Mathematics

shubhamsrg:
Group Title
Consider a cylinder with radius = 5 cm and height = 20 cm. The cylinder is placed vertically on the ground and water is filled in to a heigh…
 updated one year ago
 38 replies
 2 Medals
Mathematics

frx:
Group Title
Are the following set of vectors in R^4 linearly independent?
\[\left\{ (1,0,2,1),(1,2,1,0),(1,1,0,1) \right\}\]
…
 updated one year ago
 12 replies
 1 Medal
Mathematics

frx:
Group Title
What is the shortest distance from the point (x,y,z) to (a) the xyplane (b) the xaxis?
Could someone please explain this one, maybe wi…
 updated one year ago
 11 replies
 2 Medals
Mathematics

frx:
Group Title
Have been looking for exercises similar to this one \[\int\limits_{}^{} \frac{ \sin2\theta }{ \cos ^{2}\theta+6\cos \theta+10 }d \theta \] …
 updated one year ago
 6 replies
 2 Medals
Mathematics

frx:
Group Title
I'm a bit confused. I thought I'd solved the problem but when running the integral through Wolframalpha the answer is totally different, am …
 updated one year ago
 12 replies
 1 Medal
Mathematics

timsharp:
Group Title
y=4sinx
 updated one year ago
 5 replies
 No Medals Yet
Mathematics

lawls:
Group Title
sketch the graph of the polar equation. r = theta/2
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

itsjustme_lol:
Group Title
Operations on Complex Numbers
 updated one year ago
 19 replies
 No Medals Yet
Mathematics

itsjustme_lol:
Group Title
Operations on Complex Numbers
 updated one year ago
 8 replies
 1 Medal
Mathematics

horsewhisperer:
Group Title
How do I solve and graph this inequality? 12x + 4 ≥ 16 or 3x – 5 ≤ –14
 updated one year ago
 11 replies
 1 Medal
Mathematics

taydub10:
Group Title
sqrt x^25x+4=x3
solve the radical equation
 updated one year ago
 5 replies
 No Medals Yet
Mathematics

marixoxo76:
Group Title
Simplify by factoring.
 updated one year ago
 4 replies
 No Medals Yet
Mathematics

Idealist:
Group Title
Find all open intervals on which f(x)=x/(x^2+x2) is decreasing. I found that f'(x)=(x^2+2)/(x^2+x2)^2 but what do I do after that?
 updated one year ago
 5 replies
 1 Medal
Mathematics

Itel:
Group Title
Express the complex number in trigonometric form.
4
 updated one year ago
 14 replies
 2 Medals
Mathematics

mwhiteaker222:
Group Title
What is the slope of a line parallel to line with this equation 4x – 2y = 16
 updated one year ago
 3 replies
 No Medals Yet
Mathematics

dolly0114:
Group Title
Can anybody help me?
…
 updated one year ago
 8 replies
 1 Medal
Mathematics

tiawanad:
Group Title
factor trinomial x^2+10x+37
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

alli404:
Group Title
When solving systems of equations, how do you determine what method to use?
solve the system and post your solution, showing your steps so …
 updated one year ago
 4 replies
 No Medals Yet
Mathematics

frx:
Group Title
Is the serie \[\sum_{n=0}^{\infty} (1)^{n}\frac{ n+2 }{ 3^{n} }\]
convergent or divergent? Calculate is't value.
\[\lim_{n \rightarrow \i…
 updated one year ago
 11 replies
 2 Medals
Mathematics

frx:
Group Title
Show that \[e ^{x} \ge 1+x\] for all real numbers x
 updated one year ago
 13 replies
 1 Medal
Mathematics

frx:
Group Title
Let A be the matrix \[A=\left[\begin{matrix}1 & 2\\ 2 &4\end{matrix}\right]\] decide all the 2x2 matrices B such that AB=BA=0, where 0 is …
 updated one year ago
 20 replies
 1 Medal
Mathematics

frx:
Group Title
Question: For which real constants a and b does the vectors [(1,a,0),(a,1,1),(b,1,1)] lie in the same plane?
So know that the lines are …
 updated one year ago
 4 replies
 1 Medal
Mathematics

frx:
Group Title
The equation for an ellipse is \[\frac{ x ^{2} }{ a ^{2} }+\frac{ y ^{2} }{ b ^{2}}=1\] and the foci is given by (c,0) where \[c ^{2}=a ^{2}…
 updated one year ago
 13 replies
 1 Medal
Mathematics

datanewb:
Group Title
Trying to adjust this equation so that it will have fatter tails?\[3^{\left(\frac{x}{6}\right)^{2}} \] Any ideas? It is similar to the pro…
 updated one year ago
 15 replies
 1 Medal
Mathematics

blast234:
Group Title
Hi
 updated one year ago
 19 replies
 1 Medal
Mathematics

IanK16.:
Group Title
Will give Medal for Correct Answer.
Which equation represents the line that passes through the points (6, –3) and (–4, –9)? (1 point)
y …
 updated one year ago
 6 replies
 1 Medal
Mathematics
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