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Question

# Identify the polynomials among the following. (1) x + 1 (2) x2+1+2x (3)x3+1 (4)x+1x

A

1, 2, 3

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B

1

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C

4

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D

1 and 4

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Solution

## The correct option is A 1, 2, 3 Polynomial is an expression with power of the variables to be a whole numbers. (1) x+ 1 –> Power of x is 1 => Linear polynomial (2) x2+1+2x -> Powers of x are 1,2 => Quadratic polynomial (3) x3+1 –> Power of x is 3 => cubic polynomial (4) x+1x = x+x−1 -> Powers of x are -1, 1 → –1 is not a whole number. So this expression is not a polynomial.

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