
SOMA DE PG
Quiz
•
Mathematics
•
10th Grade
•
Practice Problem
•
Hard
Luiz Santana
FREE Resource
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31 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Soma dos 5 primeiros termos de uma P.G. Qual é a soma dos cinco primeiros termos de uma P.G. com o primeiro termo (a¹) igual a 2 e razão (r) igual a 3?
A) 242
B) 62
C) 326
D) 364
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se a soma dos primeiros 3 termos de uma P.G. é 20, e o primeiro termo (a₁) é 5, qual é a razão (r) da P.G.?
A) 2
B) -2
C) 4
D) -4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se a soma dos primeiros 4 termos de uma P.G. é 16 e o primeiro termo (a¹) é 2, qual é a razão (r) da P.G.?
A) 4
B) 1/2
C) 2
D) 8
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a fórmula para calcular a soma dos primeiros n termos pares de uma P.G.?
A) S_pares = S₁ - S_impares
B) S_pares = S₁ / 2
C) S_pares = S₂ * 2
D) S_pares = Sn
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se o primeiro termo (a₁) de uma P.G. é 1000 e a razão (r) é 0,5, qual é a soma infinita dessa P.G. decrescente?
A) 250
B) 200
C) 500
D) 100
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se o primeiro termo (a₁) de uma P.G. é -3, a razão (r) é 2 e o número de termos (n) é 4, qual é a soma dos primeiros 4 termos?
A) -24
B) 20
C) -12
D) 12
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Em uma cidade, a população inicial era de 1000 habitantes. A cada ano, a população aumenta em 10%. Qual é a população total da cidade após 5 anos?
A) 1500
B) 1610
C) 1611
D) 2000
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