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Questions Answered

P0sitr0n:
Group Title
Suggestions for integral variable change? http://tinypic.com/r/2s7xboj/8
 updated 19 days ago
 10 replies
 2 Medals
Mathematics

ParthKohli:
Group Title
\[x^2 + x + 1 = \sin(x)\]
 updated 5 months ago
 9 replies
 6 Medals
Mathematics

ParthKohli:
Group Title
Challenge problem for y'all.
 updated 5 months ago
 36 replies
 5 Medals
Mathematics

BSwan:
Group Title
find :
\(\int e^{\frac{1}{z}}\)
 updated 5 months ago
 19 replies
 2 Medals
Mathematics

NelsonDKZ:
Group Title
5.5.7. Let α A → B and β : B → C be invertible mappings. (a) Prove that β ◦α : A → C is invertible.
 updated 5 months ago
 3 replies
 No Medals Yet
Mathematics

tangyichuan:
Group Title
why hessian is applied to identify the characteristcs of stationary points of f(x,y)?
 updated 5 months ago
 3 replies
 1 Medal
Mathematics

MeggieJaleco:
Group Title
Which of the following is true?
a. net cash flow  cash outflow = cash inflow
b. net cash flow + cash outflow = cash inflow
…
 updated 5 months ago
 1 reply
 No Medals Yet
Mathematics

AP_Calculus:
Group Title
Use the derivative to show why f(x)=the integral of 1/square root of (4+e^t) from 0 to ln(x) has an inverse function?
 updated 5 months ago
 17 replies
 5 Medals
Mathematics

Isbella:
Group Title
which of the following sets of vectors in R^6 are linearly independent?
A. {(8 0 0 0 0 0),(0 7 0 0 0 0),(0 0 16 0 0 0)}
B. {(8 0 0 0 0 0)…
 updated 5 months ago
 5 replies
 2 Medals
Mathematics

AntiNode:
Group Title
What is the cross section formula of a sphere? is it pir^2
 updated 5 months ago
 22 replies
 1 Medal
Mathematics

BrighterDays:
Group Title
Have I worked this correctly? A particle moves along a line with velocity function v(t)=t^2t, where v is measured in meters per second. De…
 updated 5 months ago
 12 replies
 1 Medal
Mathematics

lol1784:
Group Title
Compute the surface area of the surface generated by revolving one arch of the cycloid c(t)=(10t−10sint,10−10cost) about the xaxis. Hint: U…
 updated 5 months ago
 2 replies
 No Medals Yet
Mathematics

kdekle:
Group Title
How many distinct positive integers would we have to choose from the numbers 1,2,3,.....,2014 to guarantee that some pair of the chosen valu…
 updated 5 months ago
 6 replies
 2 Medals
Mathematics

mony01:
Group Title
Use binomial series to expand the function as a power series. State the radius of convergence.
 updated 5 months ago
 5 replies
 No Medals Yet
Mathematics

Kainui:
Group Title
Geometric series using complex numbers with a length of 1.
 updated 5 months ago
 27 replies
 5 Medals
Mathematics

sourwing:
Group Title
Physics word problem. A ball is shot straight up from the ground at the initial velocity of 20m/s. 2 seconds later, a second ball is shot st…
 updated 5 months ago
 7 replies
 1 Medal
Mathematics

itsmeeQUENNIE:
Group Title
a hydraulic balance used to detect small mass changes. If a mass of 0.25g is placed on the platform balance, by how much will of the water …
 updated 5 months ago
 6 replies
 No Medals Yet
Mathematics

Airrick:
Group Title
Find the particular series solution with terms to order 6 of the equation that satisfies the given initial conditions.
(1x)y'''2xy'+3y=0;…
 updated 5 months ago
 8 replies
 3 Medals
Mathematics

AchuPyli:
Group Title
Given that ax^2+bx+c=0 has no real roots and a+b+c<0. Then,
(a) c=0 (b) c>0 (c) c<0 (d) c not equal to 0
 updated 5 months ago
 4 replies
 3 Medals
Mathematics

sylbot:
Group Title
I have a general question: What do you need to prove that tangent plane of a function of multiple variables exists? Continuity is not enough…
 updated 5 months ago
 48 replies
 3 Medals
Mathematics

amiyumiify:
Group Title
In a laminar flow, how to derive Umax if the fluid is flowing in a circular pipe vertically downward. There are 3 forces act on the flow (gr…
 updated 5 months ago
 2 replies
 1 Medal
Mathematics

LilliBelle:
Group Title
Which results from water's formation of hydrogen bonds?
…
 updated 5 months ago
 5 replies
 3 Medals
Mathematics

LilliBelle:
Group Title
How many total atoms are in one molecule of nickel hydroxide, Ni(OH)2?
…
 updated 5 months ago
 3 replies
 3 Medals
Mathematics

Ashy98:
Group Title
heelpp????
 updated 5 months ago
 5 replies
 3 Medals
Mathematics

LilliBelle:
Group Title
How many hydrogen (H) atoms are in one molecule of sulfuric acid, H2SO4?
…
 updated 5 months ago
 3 replies
 1 Medal
Mathematics

jassikat:
Group Title
solve limit(n+1)^1/ln(n+1)
 updated 5 months ago
 3 replies
 1 Medal
Mathematics

sourwing:
Group Title
given a set A, is A = ∪P(A)?
Note: ∪P(A) is the union of the power set of A
…
 updated 5 months ago
 13 replies
 1 Medal
Mathematics

LilliBelle:
Group Title
A scientist places an airfilled balloon into a freezer and observes that the balloon shrinks. Which best explains why this happens?
…
 updated 5 months ago
 6 replies
 2 Medals
Mathematics

Light&Happiness:
Group Title
Identify the type of sample used.
Max surveys the children who live on his street about the types of equipment they want installed at th…
 updated 5 months ago
 1 reply
 1 Medal
Mathematics

ilmausman:
Group Title
do electrons really radiate energy?
 updated 5 months ago
 3 replies
 1 Medal
Mathematics
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