Wall for Rod

Please can you help me to solve this, ( 2'-3) this the point
Jul 23, 2016 by lovelymath
The function f(x)=x^3-x^2-x-11/4 is graphed in the x-y plane above. If k is a constant such that the equation f(x)=k has three real solutions, which of the following could be the value of k?
Jul 23, 2016 by lovelymath
Please help me to solve this. Thanks

Let A, B, n to be whole number.
What is the modular form of the elliptic equation:  Y^2= X^3+(A^n-B^n)X^2-(AB)^n
Nov 22, 2015 by lovelymath
Thank you for answering my more than a year old question about a spiral of pipe.  Frankly, I had forgotten about it and shleved the idea.  But now I may go ahead with it.  The idea is to use PEX high dtemperature plastic pipe, painted black and coiled up in the sun, as a water heater for my RV.  I got the idea when I nearly burned my hand with water from a garden hose left in the sun.  I reasoned that if the water was that hot from a light colored garden hose, how much hotter would it be if the "hose" were black (dark green has been shown to be better) and "under glass" - but the question was, how much "hose" (pipe) could I fit on the roof and would there be enough water to be useful?  Your answer shows that the idea is feasable and probably affordable.  Thank you- gabbyjim, Idaho Falls, ID, USA
Jul 12, 2015 by anonymous
Can you tell me what happened to 3x-2-x-2-0-need-to-know-how-to-compute-the-discriminant? I answered it on 7 Jun. It was flagged with the message "Your answer will be checked and approved shortly. " However, I never got credit for it, and it has disappeared.
Jun 10, 2015 by CWA
86,813 questions
93,397 answers
24,170 users