RolyPoly
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Questions Answered

RolyPoly:
Group Title
Use MI to prove that \(n^21\) is divisible by 8 for any positive odd integer n.
 updated 6 months ago
 8 replies
 1 Medal
Mathematics

Jayinmn:
Group Title
Prove that for any integer n, n(n+1)/2 is also an integer.
 updated one month ago
 4 replies
 2 Medals
Mathematics

RolyPoly:
Group Title
Solve the following recurrence:
\[f(x) =\begin{cases} x & x \le 3 \\ f(x3) + 4 & x > 3\end{cases}\]
 updated 6 months ago
 76 replies
 2 Medals
Mathematics

RolyPoly:
Group Title
<Linear Algebra>
Prove that a system of linear equations cannot have exactly two solutions.
 updated 5 months ago
 23 replies
 2 Medals
Mathematics

RolyPoly:
Group Title
<Linear Algebra>
In the process of solving a system of linear equations, we have three elementary row operations, which are
(I) Exchange t…
 updated 6 months ago
 39 replies
 3 Medals
Mathematics

Ssusu:
Group Title
find max value of function f(x)=1xx^2
 updated 7 months ago
 14 replies
 2 Medals
Mathematics

Kainui:
Group Title
Is this a legitimate way to calculate integrals:
 updated 7 months ago
 13 replies
 5 Medals
Mathematics

DUDE..IM..A..DUCK:
Group Title
what is the derivative of pi^2.
 updated 7 months ago
 25 replies
 6 Medals
Mathematics

Christos:
Group Title
Reduction formula!
…
 updated 7 months ago
 8 replies
 3 Medals
Mathematics

kryton1212:
Group Title
Two fair dice were rolled once.
(a) What is the probability of getting a sum of 7?
(b) What is the probability of getting a sum greater th…
 updated 6 months ago
 8 replies
 1 Medal
Mathematics

ygarcia:
Group Title
Find COS 23pi/6?
 updated 7 months ago
 76 replies
 1 Medal
Mathematics

gabriel72alv:
Group Title
(3w^3 x^6)^3
Write your answer using only positive exponents.
 updated 7 months ago
 22 replies
 2 Medals
Mathematics

cassieblake:
Group Title
Sanjay has $65 to spend at the mall. He bought a Tshirt for $18 and a belt for $14. If Sanjay wants a pair of jeans, how much can he spend?
 updated 7 months ago
 1 reply
 No Medals Yet
Mathematics

ccastudent775:
Group Title
solve the equation 2v  7 = 23
 updated 7 months ago
 5 replies
 1 Medal
Mathematics

_mr_joey_:
Group Title
Can anyone explain to me the distance formula in geometry ?
 updated 7 months ago
 4 replies
 No Medals Yet
Mathematics

tswavy:
Group Title
Find the distance between the points (1, 2) and (4, 3).
…
 updated 7 months ago
 1 reply
 1 Medal
Mathematics

iamthecookiemonster:
Group Title
.Write the direct linear variation equation for the relationship:
y varies directly with x and y = 4 when x = 12.
…
 updated 7 months ago
 1 reply
 1 Medal
Mathematics

yesy7:
Group Title
Find all solutions in the interval [0, 2π).
(sin x)(cos x) = 0
 updated 7 months ago
 7 replies
 2 Medals
Mathematics

Concentrationalizing:
Group Title
Convert the triple integral into spherical coordinates.
 updated 7 months ago
 61 replies
 2 Medals
Mathematics

novi:
Group Title
130 multiply 10
 updated 7 months ago
 16 replies
 No Medals Yet
Mathematics

geo12345679789:
Group Title
use substitution method in system of equation to solve :
2xy=10…
 updated 7 months ago
 10 replies
 No Medals Yet
Mathematics

yesy7:
Group Title
Find all solutions in the interval [0, 2π).
7 tan^3x  21 tan x = 0
 updated 7 months ago
 6 replies
 2 Medals
Mathematics

RolyPoly:
Group Title
Consider f(n) = lg(n).
What is the largest size n of the problem that can be solved in 1 second, assuming that the time required to solve t…
 updated 7 months ago
 82 replies
 1 Medal
Mathematics

vishal011998:
Group Title
if x²>a² then x>a and x<a how?
 updated 7 months ago
 16 replies
 4 Medals
Mathematics

kryton1212:
Group Title
4 boys and 4 girls are arranged to sit in a row. Find the number of arrangements that can be made if :
(a) there is no restriction,
>>>(4+…
 updated 7 months ago
 29 replies
 No Medals Yet
Mathematics

thatguy44:
Group Title
Anyone in algebra 1 and have the quadratic functions and equations test?
 updated 7 months ago
 3 replies
 No Medals Yet
Mathematics

desalexus:
Group Title
How can you determine whether a matrix product AB is defined?
…
 updated 7 months ago
 14 replies
 No Medals Yet
Mathematics

ROCKN3OH3STYLE:
Group Title
If f(x) = 4x^2 3x+1, find (f(x+h)f(x))/(h))
 updated 8 months ago
 3 replies
 No Medals Yet
Mathematics

Emily778:
Group Title
check for extraneous solutions.
sqrt x+7x=1
Please show step by step on how to do this. Thankyou.
 updated 8 months ago
 75 replies
 2 Medals
Mathematics

RolyPoly:
Group Title
Whether zero is a natural number or not is still controversial.
What is the (mathematical) argument for 0 *NOT* being a natural number?
 updated 8 months ago
 8 replies
 1 Medal
Mathematics
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