
PA e PG
Quiz
•
Mathematics
•
11th Grade
•
Practice Problem
•
Medium
Nuno Santos
Used 1+ times
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6 questions
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1.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Numa progressão aritmética o oitavo e o décimo segundo termos são, respetivamente, 2 e -14. Qual é o primeiro termo?
Escreve apenas o número correspondente.
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
320
1000
1480
1280
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
n+5
2n+5
6-n
9-2n
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
De uma progressão aritmética (un) sabe-se que u3=15 e u6=-3. A soma dos 10 termos consecutivos a partir do 5.º termo, inclusive, é:
-189
-330
-276
-240
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A soma dos 10 primeiros termos da progressão geométrica de termo geral an=2x4n é:
87 381
349 525
1 398 100
2 796 200
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Nas figura estão representados os três primeiros círculos de uma sucessão de círculos, tangentes. Sabe-se que o primeiro círculo tem raio 2cm. O raio de cada círculo aumenta 1 unidade em relação ao do círculo anterior. Quantos círculos foram construídos, no mínimo, sabendo que preencheram um segmento com 208cm de comprimento?
16
13
100
103
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