Question

Please select the best answer from the choices provided

A
B
C
D

Answer 1

the answer is D simply................

Answer 2

ANSWER

The correct answer is D.


`\sum_(n=1) ^(6) (n - 3) = ( - 2) + ( - 1) + (0) + (1) + (2) + (3) = 3`

Step-by-step explanation

The given expression is


`\sum_(n=1) ^(6) (n - 3)`

The symbol means summation.

So we need to substitute


`n=1,n=2,n=3,n=4,n=5, \:and\:n=6`

into the formula and add all to get,


`\sum_(n=1) ^(6) (n - 3) = (1 - 3) + (2 - 3) + (3- 3) + (4 - 3) + (5 - 3) + (6 - 3)`

We simplify to obtain,


`\sum_(n=1) ^(6) (n - 3) = ( - 2) + ( - 1) + (0) + (1) + (2) + (3) = 3`

The correct answer is D