Consider the sequence 2, 5, 10, 17,

what is the value of a4?

2

5

10

17

The answer is

Step-by-step explanation:

we have the sequence

Let

a1-----> the first term

a2----> the second term

a3----> the third term

a4----> The fourth term

In this problem we have

therefore

the answer is

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

you'll just earn points here

step-by-step explanation: