corey1234
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Questions Answered

vkolli123:
Group Title
cos(5π/12)
 updated one month ago
 2 replies
 3 Medals
Mathematics

corey1234:
Group Title
I have a question on thermodynamics. It is about a piston cylinder arrangement with gas underneath the piston. My book says if you change th…
 updated one month ago
 33 replies
 3 Medals
Mathematics

corey1234:
Group Title
Imagine a boxcar with a lamp on the left end and a mirror on the right end, so that a light signal can be sent down and back. The boxcar is …
 updated 8 months ago
 1 reply
 No Medals Yet
Mathematics

mathlilly:
Group Title
Show by verifying the hypothesis of the Existence and Uniqueness Theorem that the initial value problem x dot = 1+x^2, x(0) = 0 has a unique…
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

corey1234:
Group Title
If it is the GRAPH of a function from A to B that is a subset of A x B, then why do websites say that a function f is a subset of A x B? S…
 updated one year ago
 3 replies
 No Medals Yet
Mathematics

corey1234:
Group Title
For the function f(x)==2x, I get why the inverse function is f^1(y)==y/2, but why is it ok to write it equivalently as f^1(x)==x/2? x and …
 updated one year ago
 9 replies
 2 Medals
Mathematics

corey1234:
Group Title
For the operation (a,b)*(c,d)=(acbd, ad+bc), on the set R X R with the origin deleted, is there an inverse element for every (x,y) in that …
 updated one year ago
 4 replies
 No Medals Yet
Mathematics

corey1234:
Group Title
Ok. I have a very hard question. Hopefully someone here can solve it. Now for binary operations, well I have one here, and I need to know if…
 updated one year ago
 6 replies
 No Medals Yet
Mathematics

corey1234:
Group Title
Ok. I have a very hard question. Hopefully someone here can solve it. Now for binary operations, well I have one here, and I need to know if…
 updated one year ago
 36 replies
 1 Medal
Mathematics

corey1234:
Group Title
Why is it that the derivative of y=f(x) with respect to y is 0? Such as the derivative of y=x with respect to y..which is 0.
 updated 2 years ago
 3 replies
 No Medals Yet
Mathematics

corey1234:
Group Title
For the diff eq. (dy/dx)=(1y)/x, I see that it is not continuous or defined at x=0. however, if you graph the solution y=cx+1, then you get…
 updated 2 years ago
 3 replies
 No Medals Yet
Mathematics

dancelovesummer:
Group Title
Jason ran for 1.5 hours with a 2 mph wind at his back. It took him 2.5 hours to get home with the same wind in his face. If he ran in the sa…
 updated 2 years ago
 2 replies
 No Medals Yet
Mathematics

shaun786:
Group Title
Let T : R^3 > R^2, T(x, y, z) = (2x + y + z, y  3z)
Show that T is a linear transformation.
 updated 2 years ago
 1 reply
 1 Medal
Mathematics

corey1234:
Group Title
Hi. I have a question concerning mainly the idea of notation of dimensions. So we say that R2 is a 2 dimensional vector space. It can hold f…
 updated 2 years ago
 2 replies
 No Medals Yet
Mathematics

crossingdouble:
Group Title
Let V be the set of all continuous functions defined on [0,1].
Explain why V is a subspace of T(R).
Let W be the subset of V defined by W …
 updated 2 years ago
 2 replies
 1 Medal
Mathematics