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ANAALICE1304ON
Respondido

Determine o 23º termo da PA (26, 20, 14, ...) *
- 100
- 106
112
- 68


Me ajudem pfv

Resposta :

JOHANLIEBERTON

Resposta:

[tex]a_{1}=26\\\\ r=20-26=-6\\\\n=23\\\\a_{n}= a_{1}+(n-1)*r\\\\a_{n}= 26+(23-1)*(-6)\\\\a_{n}= 26+(22)*(-6)\\\\a_{n}= 26-132\\\\a_{n}= -106[/tex]

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