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Questions Answered

frx:
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:
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:
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:
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:
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:
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:
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:
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
 1 Medal
Mathematics

frx:
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:
y=4sinx
 updated one year ago
 5 replies
 No Medals Yet
Mathematics

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

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

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

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

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

Idealist:
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:
Express the complex number in trigonometric form.
4
 updated one year ago
 14 replies
 1 Medal
Mathematics

mwhiteaker222:
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:
Can anybody help me?
…
 updated one year ago
 8 replies
 1 Medal
Mathematics

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

alli404:
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:
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:
Show that \[e ^{x} \ge 1+x\] for all real numbers x
 updated one year ago
 13 replies
 1 Medal
Mathematics

frx:
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:
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:
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:
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:
Hi
 updated one year ago
 19 replies
 1 Medal
Mathematics

IanK16.:
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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