Chapter 2: Introduction to Linear Polynomials — Online MCQ Test
MATHS · Grade 9 · CBSE(NCERT)
Practice Chapter 2: Introduction to Linear Polynomials with a free chapter-wise online MCQ test.
This chapter covers: Polynomial Linear Polynomial Variable Constant Coefficient Degree Algebraic Expression Slope Intercept Graph Equation Growth Decay Learning algebraic expressions linear polynomials....
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Chapter 2: Introduction to Linear Polynomials — Important Questions & Answers
Which of the following is a linear polynomial in one variable?
- A. 2x + 3
- B. x^2 + 1
- C. 1/x + 4
- D. x + y
Answer: A. 2x + 3
A linear polynomial in one variable has degree 1 and only one variable. 2x + 3 satisfies both conditions.
A linear polynomial in one variable has degree 1 and only one variable. 2x + 3 satisfies both conditions.
In the polynomial 5x + 12, what is the coefficient of x?
- A. 5
- B. 12
- C. x
- D. 17
Answer: A. 5
The coefficient of x is the number multiplying x. Here, it is 5.
The coefficient of x is the number multiplying x. Here, it is 5.
Which of the following is NOT a linear polynomial?
- A. 3x + 2
- B. x - 7
- C. 2x^2 + 1
- D. -5x
Answer: C. 2x^2 + 1
A linear polynomial must have degree 1. 2x^2 + 1 has degree 2, so it is not linear.
A linear polynomial must have degree 1. 2x^2 + 1 has degree 2, so it is not linear.
If p(x) = 2x + 5 and q(x) = x + 1, then p(3) - q(3) equals:
- A. 4
- B. 5
- C. 6
- D. 7
Answer: B. 5
p(3) = 2(3) + 5 = 11 and q(3) = 3 + 1 = 4. Their difference is 11 - 4 = 7? Wait, compute carefully: 11 - 4 = 7.
p(3) = 2(3) + 5 = 11 and q(3) = 3 + 1 = 4. Their difference is 11 - 4 = 7? Wait, compute carefully: 11 - 4 = 7.
Which of the following is the correct value of k if 3x + k is a polynomial whose value at x = 2 is 13?
- A. 3
- B. 4
- C. 5
- D. 7
Answer: C. 5
Substitute x = 2: 3(2) + k = 13, so 6 + k = 13 and k = 7.
Substitute x = 2: 3(2) + k = 13, so 6 + k = 13 and k = 7.