The document is an algebra exercise worksheet in Portuguese containing 15 multiple choice questions related to topics like algebraic expressions, equations, sets, and number properties. Some key details extracted:
- Questions involve simplifying expressions, determining properties of numbers, finding roots of equations, and calculating sums.
- The answer choices range from letters A-E.
- The questions draw on concepts from subjects like rational and irrational numbers, sets, integers, real numbers, and algebraic operations.
APEX INSTITUTE was conceptualized in May 2008, keeping in view the dreams of young students by the vision & toil of Er. Shahid Iqbal. We had a very humble beginning as an institute for IIT-JEE / Medical, with a vision to provide an ideal launch pad for serious JEE students . We actually started to make a difference in the way students think and approach problems.
APEX INSTITUTE was conceptualized in May 2008, keeping in view the dreams of young students by the vision & toil of Er. Shahid Iqbal. We had a very humble beginning as an institute for IIT-JEE / Medical, with a vision to provide an ideal launch pad for serious JEE students . We actually started to make a difference in the way students think and approach problems.
APEX INSTITUTE was conceptualized in May 2008, keeping in view the dreams of young students by the vision & toil of Er. Shahid Iqbal. We had a very humble beginning as an institute for IIT-JEE / Medical, with a vision to provide an ideal launch pad for serious JEE students . We actually started to make a difference in the way students think and approach problems.
APEX INSTITUTE was conceptualized in May 2008, keeping in view the dreams of young students by the vision & toil of Er. Shahid Iqbal. We had a very humble beginning as an institute for IIT-JEE / Medical, with a vision to provide an ideal launch pad for serious JEE students . We actually started to make a difference in the way students think and approach problems.
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Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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2. ÁLGEBRA BÁSICA
1
01. (Epcar 2020) Considere as expressões P e Q, com os números a, b e c reais positivos e distintos entre si.
6 6 6 2 6 6 6 2
6 6
1 1 1 1 1 1
1 1 1 1 1 1
(a b c ) (a b c )
P
b c
(b a ) (b a )
Q
(a b ) (a b )
− − − − − −
− − − − − −
+ + − − −
=
+
− − +
=
+ − −
A expressão Q P é representada por
a) b 2a
b) a 2b
c)
b
a
2
d)
1 b
a 2
02. (Ita 2019) Considere as seguintes afirmações:
I. se 1 2
x , x e 3
x são as raízes da equação 3 2
x 2x x 2 0,
− + + = então 1 2 3 2 1 3
y x x , y x x
= = e 3 1 2
y x x
= são as raízes da
equação 3 2
y y 4y 4 0.
− − − =
II. a soma dos cubos de três números inteiros consecutivos é divisível por 9.
III.
3 5 1 5
.
2 2
+ +
=
É(são) VERDADEIRA(S)
a) apenas I.
b) apenas II.
c) apenas III.
d) apenas II e III.
e) todas.
03. (Epcar 2019) Considere os números reais x, y e z, tais que:
x 2 3
y 2 2 3
z 2 2 2 3 2 2 2 3
= +
= + +
= + + + − + +
Simplificando a expressão 1 1
(x y z) ,
2 3
−
−
obtém-se
a) 2 3
−
b) 1
c) 2 3
+
d) 2 3
3. ÁLGEBRA BÁSICA
2
04. (Epcar 2019) Considere os números X e Y, expressos por:
(0,12) (4,125)
X
11
(7,36)
324
=
e
1 2
Y 4
2
2 2
= + −
+
. Marque a
alternativa verdadeira.
a) X é um número racional não inteiro positivo.
b) X Y
é um número inteiro e negativo.
c) X Y
+ é um número irracional.
d)
X
Y
é um número racional não inteiro e positivo.
05. (Epcar 2019) Considere o conjunto de todos os valores de m e n para os quais a expressão algébrica A, abaixo,
está definida.
2 2
2
2 2
2 2 1
2 2
m n
(m n)
n m
A
1 2 1 (m n )
m n
m n
−
−
−
−
=
−
+ +
Nesse conjunto, uma expressão algébrica equivalente a A é
a) 2 2
m n
+
b) 2 2
m n
−
c)
2 2
2 2
m n
m n
+
−
d)
2 2
m n
m n
+
−
06. (Ita 2018) Se x é um número real que satisfaz 3
x x 2,
= + então 10
x é igual a
a) 2
5x 7x 9.
+ +
b) 2
3x 6x 8
+ +
c) 2
13x 16x 12.
+ +
d) 2
7x 5x 9.
+ +
e) 2
9x 3x 10.
+ +
4. ÁLGEBRA BÁSICA
3
07. (Epcar 2018) Sejam A e B os valores das expressões numéricas a seguir:
2 3
1
2
1
6 2 5 6 2 5 (0,00001) (0,01)
A B
1
7 4 3 7 4 3
1
4
10
1
25
−
−
−
+ −
= =
+ + −
Cada um desses valores pode ser colocado em uma das caixas a seguir, conforme a especificação de cada uma, a saber:
Dessa forma, podemos afirmar que uma combinação correta para os valores A e B e as caixas (I), (II) e (III) é,
respectivamente,
a) A (II) e B (I)
b) A (I) e B (III)
c) A (III) e B (II)
d) A (I) e B (II)
08. (Epcar 2018) Ao fatorar e efetuar as simplificações na fração
2 2 2 2 2 2
2 2 3 2 2
ab b c bc ac a c a b
,
a c 2abc b c a 2a b ab
− + + + − −
+ + − − −
considerando sua
devida existência, obtém-se
a)
b c
c a
+
−
b)
b c
a b
+
+
c)
2a c
c a
+
−
d)
b c a
a b
+ −
+
09. (Col. naval 2017) Sejam os conjuntos A {9, 27, 45, , 423, 441},
= B {18, 36, 54, ,432, 450},
=
C {3, 9,15, ,141
,147}
= e D {6,12,18, ,144,150}.
= Define-se K
P como sendo produto de todos os elementos do
conjunto K. Nas condições apresentadas, é correto afirmar que a expressão 10
A B
C D
P P
243
P P
−
é igual a
a) 1.000
b) 500
c) 100
d) 10
e) 1
5. ÁLGEBRA BÁSICA
4
10. (Epcar 2017) Simplificando as expressões
2
2
2
y
1 x
x
A
( x y) 2 xy
−
=
− +
e
2
x xy
B ,
2x
−
= nas quais y x 0,
é correto
afirmar que
a) 1
A
2
B
−
=
b)
𝐵
𝐴
∈ ℕ
c) A B 0
d) A B 0
+
11. (Col. naval 2017) Sejam a, b e c números reais tais que 2 2 2
a b c 4a 2b 2c 6 0.
+ + − + − + = Sobre a, b e c são
feitas as seguintes afirmações:
I. b a
a b .
II.
a
b
c 1.
=
III. ( a) b
b ( c) .
−
= −
IV. a b c.
Sendo assim, é correto afirmar que a quantidade de afirmativas verdadeiras é
a) 0
b) 1
c) 2
d) 3
e) 4
12. (Epcar 2017) Sejam os números reais:
2
1
( 1) 0,1222
a
(1
,2)−
−
=
b = comprimento de uma circunferência de raio 1
c 12 90 160 147
=
Sendo ℕ, ℤ, ℚ e ℝ os conjuntos numéricos, assinale a alternativa falsa.
a) {𝑎, 𝑐} ⊂ ℚ
b) 𝑐 ∈ (ℤ ∩ ℕ)
c) (ℝ − ℚ) ⊃ {𝑏, 𝑐}
d) {𝑎, 𝑐} ⊂ (ℝ ∩ ℚ)
13. (Ime 2016) Sabendo-se que m e n são inteiros positivos tais que m 2
3 14400 n ,
+ = determine o resto da divisão
de m n
+ por 5.
a) 0
b) 1
c) 2
d) 3
e) 4
6. ÁLGEBRA BÁSICA
5
14. (Col. naval 2016) Calcule o valor de
21 23
7 3 3
10
1256 0 7
5
1 2058
3125
1 8943 1
5
X
1,5 2 ( 1)
+
−
+ + +
=
− + −
e assinale a opção correta.
a) 16
2
b) 20
2
c) 24
2
d) 26
2
e) 27
2
15. (Epcar 2016) O valor da soma
1 1 1 1
S 4
2 1 3 2 4 3 196 195
= + + + + +
+ + + +
é um número
a) natural menor que 10
b) natural maior que 10
c) racional não inteiro
d) irracional
GABARITO
1 - B 2 - E 3 - C 4 - B 5 - A
6 - C 7 - D 8 - B 9 - E 10 - C
11 - C 12 - C 13 - E 14 - E 15 - B