Question

which of the following is not a polynomial :
a) 4x²+2x-1
b)y+3/y
c)x³-1
d)y²+5y+1​

Answer 1

Answer:

b) y+ 3/y..

is right answer..

Answer 2

Given :  4x² - 2x - 1

y + 3/y

x³ - 1

y²+ 5y + 1

To Find :  Which one is not polynomial

Solution:

Polynomial has variables   with non negative integer power

4x² - 2x - 1    is a polynomial

y + 3/y  = y + 3y⁻¹  

  y⁻¹  has  negative power

Hence its not a polynomial

x³ - 1 is a polynomial

y²+ 5y + 1  is a polynomial

Hence  y + 3/y   is not a polynomial

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