Delta = 25 - 16 = 9 => 
;
=> 2
= (2x+1)(x+2).
=> 2
please answer ASAP need help I promise I will give brainlest but I'll have to be after two people answer the question but I'll g
et the first person the answer it brainlest 
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a) The infinite series in <em>sigma</em> notation is described by this expression:
(1)
b) The <em>explicit</em> formula for the n-th <em>partial</em> sum is represented by the following expression:
, i ∈
(2)
<h3>How to derive an expression for a monotonous series</h3>
An infinite series is <em>monotonous</em> when it is <em>bounded</em>, that is, when the limit of the <em>infinite</em> series exists. In this case, we have an evidence of monotony in the denominators of the terms of the given series. In two consecutive terms, the latter always have a denominator greater than the former.
a) The series in <em>sigma</em> notation is now described below:
b) The <em>explicit</em> formula for the n-th <em>partial</em> sum is defined by the expression within the sum, which is now presented below:
, i ∈
To learn more on infinite series: brainly.com/question/4268280
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