$\bf \textit{vertex of a vertical parabola, using coefficients} \\\\ f(x)=\stackrel{\stackrel{a}{\downarrow }}{2}x^2\stackrel{\stackrel{b}{\downarrow }}{-8}x\stackrel{\stackrel{c}{\downarrow }}{+9} \qquad \qquad \left(-\cfrac{ b}{2 a}~~~~ ,~~~~ c-\cfrac{ b^2}{4 a}\right) \\\\\\ \left(-\cfrac{-8}{2(2)}~~,~~9-\cfrac{(-8)^2}{4(2)} \right)\implies \left( \cfrac{8}{4}~~,~~9-\cfrac{64}{8} \right) \\\\\\ (2~~,~~9-8)\implies (2~~,~~1)$

5 0

3 years ago

What is A(n)=-6+(n-1)(1/5)

Mila [183]

N= - 31 over 19

alternative form

n= -1 12 over19 , n ~ - 1.63158

6 0

3 years ago

Can cointegrated variables have different differencing functions

Bess [88]

If there are 2 variables and they are I(1) then u can apply enger and granger ... Recently I came across the 1st difference OLS model in a thesis

hope this helps!

8 0

3 years ago