Recall that for n e n, we define n! , called "n factorial," by n! = n(n − 1)(n-2)(n-.2.1. prove that 1+ žj. = (n + 1), for all n en

yes because they have the same amount of green and blur marbles.

step-by-step explanation:

c

step-by-step explanation: easy math

what is the rest of the question? ?

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0