LFM Stats And Pure

View all 35 questions →

taiwan-gsat 2021 Q5 8 marks View
Assume $f ( x )$ is a fifth-degree polynomial with real coefficients, and the remainder when $f ( x )$ is divided by $x ^ { n } - 1$ is $r _ { n } ( x )$ , where $n$ is a positive integer. Select the correct options.
(1) $r _ { 1 } ( x ) = f ( 1 )$
(2) $r _ { 2 } ( x )$ is a first-degree polynomial with real coefficients
(3) The remainder when $r _ { 4 } ( x )$ is divided by $x ^ { 2 } - 1$ equals $r _ { 2 } ( x )$
(4) $r _ { 5 } ( x ) = r _ { 6 } ( x )$
(5) If $f ( - x ) = - f ( x )$ , then $r _ { 3 } ( - x ) = - r _ { 3 } ( x )$
taiwan-gsat 2022 Q4 8 marks View
Let the polynomials $f(x) = x^3 + 2x^2 - 2x + k$ and $g(x) = x^2 + ax + 1$, where $k, a$ are real numbers. Given that $g(x)$ divides $f(x)$ and the equation $g(x) = 0$ has complex roots, select the option that is a root of the equation $f(x) = 0$.
(1) $-3$
(2) $0$
(3) $1$
(4) $\frac{1 + \sqrt{-3}}{2}$
(5) $\frac{3 + \sqrt{-5}}{2}$
taiwan-gsat 2025 Q6 5 marks View
Let $a , b , c$ be real numbers, and the polynomial $f ( x ) = a ( x - 1 ) ( x - 3 ) + b ( x - 1 ) ( x - 4 ) + c ( x - 3 ) ( x - 4 )$ simplifies to $f ( x ) = x ^ { 2 }$ . Regarding the magnitude relationship of $a , b , c$, select the correct option.
(1) $a > b > c$
(2) $a > c > b$
(3) $b > c > a$
(4) $c > a > b$
(5) $c > b > a$
turkey-yks 2013 Q19 View
A second-degree polynomial $P ( x )$ with leading coefficient 3 satisfies
$$P ( 1 ) - P ( 0 ) = 2$$
Given this, what is the value of $\mathbf { P } ( \mathbf { 2 } ) - \mathbf { P } ( \mathbf { 1 } )$?
A) 4
B) 5
C) 6
D) 7
E) 8
turkey-yks 2014 Q9 View
$$\frac { x ^ { 3 } - x ^ { 2 } y - x y ^ { 2 } + y ^ { 3 } } { 2 x ^ { 2 } - 4 x y + 2 y ^ { 2 } } = \frac { 1 } { 2 }$$
Given that, what is the sum $\mathbf { x } + \mathbf { y }$?
A) 1
B) 2
C) 4
D) $\frac { 3 } { 2 }$
E) $\frac { 4 } { 3 }$
turkey-yks 2014 Q19 View
$$P ( x ) = \left( x ^ { 2 } + 2 \right) ^ { 3 } + ( x - 3 ) ^ { 5 }$$
In this polynomial, what is the coefficient of the $x ^ { 4 }$ term?
A) - 9
B) - 3
C) 1
D) 11
E) 21
turkey-yks 2014 Q20 View
$$P ( x ) = x ^ { 2 } - 3 x + 2$$
Given that, when $P ( x - 1 ) + P ( 3 x - 3 )$ is divided by $x - 1$, which of the following is the quotient obtained?
A) $4 x - 10$
B) $4 x - 22$
C) $10 x - 16$
D) $10 x - 18$
E) $10 x - 22$
turkey-yks 2016 Q8 View
$$\frac { x ^ { 4 } + x ^ { 2 } y - x ^ { 2 } y ^ { 2 } - y ^ { 3 } } { x ^ { 3 } + x y - x ^ { 2 } y - y ^ { 2 } }$$
Which of the following is the simplified form of this expression?
A) $x$
B) $y$
C) $x y$
D) $x - y$
E) $x + y$
turkey-yks 2017 Q8 View
$\frac { x z - y z + x y - y ^ { 2 } } { x ^ { 2 } - x y + x z - y z }$\ Which of the following is the simplified form of this expression?\ A) $\frac { z - y } { x - z }$\ B) $\frac { y + z } { x + z }$\ C) $\frac { x + z } { y + z }$\ D) $\frac { x } { x + y }$\ E) $\frac { y - z } { x + y }$
turkey-yks 2019 Q12 View
It is known that a fourth-degree polynomial whose leading coefficient is 1 has roots that are all integers. Some parts of this polynomial's graph where it intersects the axes in the rectangular coordinate plane are given below.
Accordingly, what is the sum of the coefficients of this polynomial?
A) 72
B) 80
C) 84
D) 92
E) 96