Question
Which of the following are polynomials?
Answer: Option B
:
B and D
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:
B and D
The exponents of the variables of a polynomial should be a whole number.
In y3+4y=y3+4y−1, the exponent of y in (4y−1) is -1 which is not a whole number.
In √2x−1, the exponent of x is a whole number.
In x+1x−1=(x+1)×(x−1)−1, the exponent of x in (x+1)−1 is not a whole number.
In z3+z, the exponents of z in both the terms is a whole number exponent.
Hence, z3+z and √2x−1 are polynomials .
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