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Questions Answered

sourwing:
A = set of all English words. R = {(x,y)∈AxA  the word y occurs at least as late in alphabetical order as the word x}. What does this even …
 updated 3 days ago
 22 replies
 1 Medal
Mathematics

Haru:
How do I simplify this to x^1 or just x?
 updated 3 days ago
 13 replies
 3 Medals
Mathematics

mony01:
find 10 partial sums of the series, graph sequence of partial sum and sequence of terms, is it convergent or divergent?
 updated 3 days ago
 49 replies
 2 Medals
Mathematics

UsukiDoll:
@satellite73 need help with something link in comments
 updated 3 days ago
 45 replies
 No Medals Yet
Mathematics

serenamoon:
http://prntscr.com/39hrwa
 updated 3 days ago
 10 replies
 2 Medals
Mathematics

UsukiDoll:
Let \(R\) be a reflexive and transitive relation on a set \(S\). Let \(R^*\) be the dual relation, \((a,b) \in R^*\) if and only if \((b,a) …
 updated 4 days ago
 62 replies
 No Medals Yet
Mathematics

BSwan:
plzzzz need help ODEs
\((\cos x) (e^y y) \frac{dy}{dx}=e^y\sin 2x \)
…
 updated 4 days ago
 12 replies
 1 Medal
Mathematics

Starr_DynastyT:
Do the ordered pairs below represent a relation, a function, both a relation and a function, or neither a relation nor a function?
(2,6…
 updated 4 days ago
 10 replies
 1 Medal
Mathematics

machamacha:
3. The following is the recipe to make one dozen muffins: 1 1/2 cups flour; 1/3cups sugar; 2 tsps. baking powder; 1 egg; 1/2 cup Crisco; …
 updated 4 days ago
 4 replies
 1 Medal
Mathematics

geerky42:
How can we tell whether it's quadratic or exponential from given table below here?
 updated 4 days ago
 17 replies
 3 Medals
Mathematics

UsukiDoll:
Question: A number is said to be algebraic if it is the root (zero) of a polynomial with integer coefficients. Show that the set of algebrai…
 updated 4 days ago
 87 replies
 2 Medals
Mathematics

UsukiDoll:
Define a product of pairs setting \((a,b) \cdot (c,d) = (ac+bd,ad+bc)\) . Show that this operation is well defined for equivalence classes.
 updated 5 days ago
 50 replies
 No Medals Yet
Mathematics

richyw:
This might be stupid, but how do I factor \(z^4+1\).
I can do it by calculating the roots the long way and then write, it out, but what are…
 updated 9 days ago
 14 replies
 7 Medals
Mathematics

iappreciateyourhelp:
closed
 updated 28 days ago
 17 replies
 1 Medal
Mathematics

jon91d:
Need some help please.
Obtain the general solution:
(D^2+D)y=cos x
 updated 28 days ago
 51 replies
 1 Medal
Mathematics

jasonjohnson86:
Write an interated integral of a continuous function f...
Double Integral f(x,y) dA
Region is semicircle in quadrants 2 and 3.
…
 updated 29 days ago
 27 replies
 2 Medals
Mathematics

UsukiDoll:
Refine the relation on a strict poset that is not maximal
…
 updated 28 days ago
 13 replies
 1 Medal
Mathematics

shelbygt520:
This probably sounds a bit naive but what does the sign: ~ mean in math?
Please Help
 updated one month ago
 7 replies
 1 Medal
Mathematics

UsukiDoll:
I need to create a poset and subset diagram for S_2 [1 2 3 5 6 7 10 14 15 21 30 35 42 70 105 210]. I've tried starting from the middle and …
 updated one month ago
 123 replies
 1 Medal
Mathematics

DE3100:
Help with one question only please really need it
 updated one month ago
 19 replies
 2 Medals
Mathematics

UsukiDoll:
what is wrong with this proof?
 updated one month ago
 8 replies
 1 Medal
Mathematics

Oural9646:
Find the solution to the differential equation, subject to the given initial condition.
http://puu.sh/7olbl.png
 updated one month ago
 30 replies
 3 Medals
Mathematics

UsukiDoll:
Find the least positive integer with remainders 1, 2, and 3 when divided by 7, 8, and 9 respectively.
 updated one month ago
 113 replies
 No Medals Yet
Mathematics

carolina198328:
Simplify the following expression. (x + 2)3
 updated one month ago
 4 replies
 No Medals Yet
Mathematics

Ozzy3443:
Write as a radical expression and simplify 27^2/3 please give me answer to this
 updated one month ago
 23 replies
 2 Medals
Mathematics

alooy:
find inverse la place trans form
f(t)=L^1{6+s^2+4/(3s^2+12)*(3s4)}
 updated one month ago
 20 replies
 2 Medals
Mathematics

ememlove:
Do these series converge or diverge?
 updated one month ago
 12 replies
 1 Medal
Mathematics

jelolopera:
Given: A(3,2),B(1,4),C(5,5), and D(9,7)
question: Find the slopes of AB, CD, AD.
question: Are the four points collinear?Verify your answ…
 updated one month ago
 9 replies
 No Medals Yet
Mathematics

OpiGeode:
HOW TO SOLVE THIS STUPID THING...
Solve for y: x=(y7/2)^1/5+3
 updated one month ago
 29 replies
 3 Medals
Mathematics

UsukiDoll:
prove by induction
 updated one month ago
 62 replies
 3 Medals
Mathematics
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