Answer:
-10
Step-by-step explanation:
[tex]\Sigma_{n=1}^4(5-3n) \\ = 5 - 3(1) + 5 - 3(2) + 5-3(3) \\+5-3( 4)\\
=(5-3)+(5-6)+(5-9)+\\(5-12)\\
=2-1-4-7\\
=2-12\\
=-10
\\ \red{ \boxed{ \bold {\therefore \: \Sigma_{n=1}^4(5-3n) = - 10}}} [/tex]
2, -1, -4, -7.
Sum = -10.
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.
