Written Instructions:
For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..
For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.
Leave your answers in the simplest form or correct to two decimal places.
1) The roots of the polynomial equation x2 +2x = 0 are
( ) |
2) The degree of the polynomial 4x2 -7x3 + 6x + 1 is
( ) |
3) .The coefficients of x2 and x in 2x3 -3x2 - 2x + 3 are respectively
( ) |
4) If the polynomial x3 –ax2+2x-a is divided (x-a), then remainder is (1)⇒ a (2)⇒(a2) (3) ⇒(a3) (4) ⇒(-a) ( ) |
5) The polynomial 3x-2 is a
( ) |
6) If a polynomial p(x) is divided by (ax+b), then the remainder is
( ) |
7) One of the factors of x3 -2x2 +2x -1 is( ) |
8) The zero of the polynomial 2x-5 is ( ) |
9) The polynomial 4x2+2x-2 is a ( ) |
10) The root of the polynomial equation 3x-1 = 0 is ( ) |
1) The roots of the polynomial equation x2 +2x = 0 are
Answer: 1 SOLUTION 1 : Hint: [ [x2 +2x = 0 ⇒ x(x+2)=0 ⇒ x = 0 (or) x + 2 = 0 ⇒ x=0 (or) x = -2 ⇒ x = 0,-2] Ans = x = 0, -2 |
2) The degree of the polynomial 4x2 -7x3 + 6x + 1 is
Answer: 2 SOLUTION 1 : Hint: [The term having the highest degree is -7x3, The degree is 3] Ans =3 |
3) .The coefficients of x2 and x in 2x3 -3x2 - 2x + 3 are respectively
Answer: 1 SOLUTION 1 : Hint:[The co-efficient of x2 is- 3 and The co-efficient of x is -2] Ans = -3,-2 |
4) If the polynomial x3 –ax2+2x-a is divided (x-a), then remainder is (1)⇒ a (2)⇒(a2) (3) ⇒(a3) (4) ⇒(-a) Answer: 3 SOLUTION 1 : Hint:[ [ p(x) = x3 – ax2 + 2x- a ⇒ The zero of x - a is a p(a) = a3-a(a)2+2(a)-a ⇒ Ans = a |
5) The polynomial 3x-2 is a
Answer: 2 SOLUTION 1 : Hint: [ The degree of 3x-2 is 1, It is a linear polynomial] Ans = linear polynomial |
6) If a polynomial p(x) is divided by (ax+b), then the remainder is
Answer: 4 SOLUTION 1 : Ans = |
7) One of the factors of x3 -2x2 +2x -1 isAnswer: 3 SOLUTION 1 : Hint:[ (x3 -2x2 + 2x -1 = x3 -x2 -x2 + x + x -1 = x2(x-1) – x(x-1) + 1(x-1) = (x-1) (x2 -x + 1) ] Ans = x - 1 |
8) The zero of the polynomial 2x-5 is Answer: 2 SOLUTION 1 : Hint: [ p(x) = 2x -5=2 ( = /2)=0. Hence x= zero of p(x) Ans = |
9) The polynomial 4x2+2x-2 is a Answer: 2 SOLUTION 1 : Hint: [ The degree of 4x2+2x-2 is 2, It is a quadratic polynomial] Ans = quadratic polynomial |
10) The root of the polynomial equation 3x-1 = 0 is Answer: 2 SOLUTION 1 : Hint: [3x -1 = 0 ⇒ 3x = 1 ⇒ x = ] Ans = x = |