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Question

Identify the cubic polynomials among the following.

1. 2x3+3x2+2x+1

2. x3+2x+3

3. 3x+5

4. y+2



A

1,2 and 3

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B

3 and 4

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C

2 and 3

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D

1 and 2

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Solution

The correct option is D

1 and 2


For a cubic polynomial, the degree of the variable in the polynomial should be 3.

1. 2x3+3x2+2x+1 – Degree of x is 3. So, cubic polynomial

2. x3+2x+3 – Degree of x is 3. So, cubic polynomial.

3. 3x+5 – Degree of x is 1 – Linear polynomial.

4. y+2 – Degree of y is 1 – Linear polynomial.


Mathematics

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