Use stigma notation to represent the dune of the first seven terms of the following sequence: -4, -6, -8, ...

7Σn=1 (-2n - 2)

Step-by-step explanation:

Sigma notation:

The top number is stop at n = 7 (inclusive)

The bottom number is start at n = 1

The equation is the expression for each term in the sum

Find explicit formula

d = -2, a₁ = -4

-4 - 2(n - 1)

-4 - 2n + 2

-2n - 2

7 goes on top of Σ

n = 1 goes on the bottom of Σ

-2n - 2 goes to the right of Σ

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

happy to

pls mark as brainliest

step-by-step explanation:

there's the chart