Seudónimo Seudónimo

28-11-2021
Mathematics

contestada

6+13+20...+(7n-1) Find the sum.

Respuesta :

28-11-2021

Answer:

2.5n+3.5n^2

Step-by-step explanation:

(6+7n-1)*n/2=2.5n+3.5n^2

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