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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+x1 -> Powers of x are -1, 1

→ –1 is not a whole number. So this expression is not a polynomial.


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