[tex]\large\text{$ O ~ valor ~do ~termo ~a20 ~ \Rightarrow ~ a20 = 60$}\\\\\large\text{$ O ~ valor ~do ~termo ~a25 ~ \Rightarrow ~a25 = 75 $}\\\\\large\text{$ O ~ valor ~do ~termo ~a30 ~ \Rightarrow ~a30 = 90 $}\\\\\large\text{$ O ~ valor ~do ~termo ~a36 ~ \Rightarrow ~ a36 = 108$}[/tex]
[tex]\Large\text{$ Progress\tilde{a}o ~Aritm\acute{e}tica $}[/tex]
Encontrar a razão da PA:
[tex]r = a2 - a1\\\\r = 6 - 3\\\\r = 3[/tex]
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Encontrar o valor do termo a20:
[tex]an = a1 + ( n -1 ) . r\\\\a20 = 3 + ( 20 -1 ) . 3\\\\a20 = 3 + 19 . 3\\\\a20 = 3 + 57\\\\a20 = 60[/tex]
Encontrar o valor do termo a25:
[tex]an = a1 + ( n -1 ) . r\\\\a25 = 3 + ( 25 -1 ) . 3\\\\a25 = 3 + 24 . 3\\\\a25 = 3 + 72\\\\a25 = 75[/tex]
Encontrar o vlor do termo a30:
[tex]an = a1 + ( n -1 ) . r\\\\a30 = 3 + ( 30 -1 ) . 3\\\\a30 =3 + 29 . 3\\\\a30 = 3 + 87\\\\a30 = 90[/tex]
Encontrar o valor do termo a36
[tex]an = a1 + ( n -1 ) . r \\\\a36 = 3 + ( 36 -1 ) . 3\\\\a36 = 3 + 35 . 3\\\\a36 = 3 + 105\\\\a36 =108[/tex]
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