Expressin σ notation.

The coefficient on starts at 14 and decreases by 2 until it reaches 0. Similarly, the coefficient on starts at 0 and increases by 1 until it reaches 7.

So the general -th term of the sum might by

where starts at 1. Because the last term in the sum is , we deduce that there are terms in the entire sum, so we have

g = (2, 2)

step-by-step explanation:

given the ratio is 1 : 1 then f is the midpoint of eg

let the coordinates of g = (x, y)

using the midpoint formula

(0 + x) = 1 ( multiply both sides by 2 )

0 + x = 2 ⇒ x = 2

similarly

(4 + y) = 3 ( multiply both sides by 2 )

4 + y = 6 ( subtract 4 from both sides )

y = 2

coordinates of g = (2, 2)