Quadratic Equations
If \(\alpha,\beta\) are the roots of the quadratic equation
\(x^2-\left( 3+2^{\sqrt{\log_23}}-3^{\sqrt{\log_32}} \right)x-2\left( 3^{\log_32}-2^{\log_23} \right) =0\),
then find the value of \(\left( \alpha^2+\alpha\beta+\beta^2 \right) \).
by
Sandeep Bhardwaj
Find the number of quadratic equations which are unchanged by squaring their roots.
by
Krishna Sharma
by
Calvin Lin
How many integral values of \(a\) lie in the interval \([-1000,1000]\) for which the inequality \({25}^x+(a+2).5^x-(a+3)<0\) is satisfied for at least one real \(x\).
by
Sandeep Bhardwaj
If the McDonald's logo were stored as a set of pixels, enlargement would quickly result in distorted or pixelated images, which are an eyesore. As such, companies often make vector images of their logos, in which the information is stored as mathematical formulae. Such vector images are easily scaled while maintaining sharp, crisp images.
As a first approximation, the logo is deconstructed and approximated as 2 parabolic curves of the form \( y = -A(x-5)^2 \) and \( y = - A (x+5)^2 \). The McDonald's logo has a height to length ratio of 1.05. What is \(A\)?
by
Calvin Lin