Shclark2020
Shclark2020 Shclark2020
  • 05-06-2018
  • Mathematics
contestada

What is the sum of the arithmetic series 18 sigma t=1 (5t-4)

A. 783
B. 1,566
C. 819
D. 86

Respuesta :

jdoe0001 jdoe0001
  • 05-06-2018
[tex]\bf \sum\limits_{t=1}^{18}~5t-4\implies \sum\limits_{t=1}^{18}~5t~~-~~\sum\limits_{t=1}^{18}~4\implies 5\sum\limits_{t=1}^{18}~t~~-~~\sum\limits_{t=1}^{18}~4 \\\\\\ 5\left[\cfrac{18(18+1)}{2} \right]~~-~~(18\cdot 4)\implies 5(171)~~-~~72 \\\\\\ 855-72\implies 783[/tex]
Answer Link

Otras preguntas

PLEASE HELP ME PICTURES INCLUDED
Which of the following statements is true? A. Isotopes have the same physical properties as the normal atom but different chemical properties. B. Isotopes
Find the sum of the first seven terms of the sequence 4, 12, 36, 108, … . a. 1,456B.1,457C.4,372D.4,374
I need help on this question
On a piece of paper, graph y-3>2x+2
1. Sarah went to the farmers market because she needed 5 more apples for her Granny’s jam recipe. The recipe calls for 32 apples. How many apples did Sarah have
why did many people doubt the anaconda plan
which of the following men does not support reparations for African Americans: Coates, Robinson, Conyers
which two kinds of structures are most common in green literature
Find x. Round to the nearest tenth if necessary. Assume that segments that appear to be tangent are tangent. Select one: a. 2.3 b. 0.9 c. 2.8 d. 3.4