Waste less time on Facebook — follow Brilliant.
Algebra
Functions
Define a function \(f : \mathbb{R} \to \mathbb{R}\) such that \(f(f(x))=x^2-x+1\) for all real \(x\).
Evaluate \(f(0) = \, \text{? } \).
by
Kaito Einstein
If \(f(x^{2015}+1)=x^{4030}+x^{2015}+1\), then what is sum of the coefficients of \(f(x^{2015}-1)?\)
by
Danish Ahmed
\[\large f(x) \ f\left(\dfrac 1 x\right) = f(x) + f\left(\dfrac 1 x\right)\]
A polynomial \(f\) satisfies the above equation and \(f(10) = 1001.\) Find the value of \(f(20).\)
by
Nishant Rai
\[\large f(x)=\frac{9^x}{9^x+3}\]
Suppose we define \(f(x) \) as above. Let \(a=f(x)+f(1-x) \) and \(b=f\left(\frac1{1996}\right) + f\left(\frac2{1996}\right) + f\left(\frac3{1996}\right)+\ldots+ f\left(\frac{1995}{1996}\right).\)
Evaluate \(a + b\).
by
Nishant Rai
by
Andy Wong