Question

Honors Pre-Calc question.

Answer 1

2, -1, -4, -7.

Sum = -10.

Explanation:

The first 4 terms are:

5 - 3(1), 5 - 3(2), 5 - 3(3), 5 - 3(4).

= 2, -1, -4, -7.

The sum of the 4 terms

= 2 - 1 - 4 - 7

= 2 - 12

= -10.

Answer 2

-10

Explanation:

`\Sigma_(n=1)^4(5-3n) \\ = 5 - 3(1) + 5 - 3(2) + 5-3(3) \\+5-3( 4)\\</p><p>=(5-3)+(5-6)+(5-9)+\\(5-12)\\</p><p>=2-1-4-7\\</p><p>=2-12\\</p><p>=-10</p><p> \\ \red{ \boxed{ \bold {\therefore \: \Sigma_(n=1)^4(5-3n) = - 10}}}`