Question

Which of the following expressions are polynomials?
(i) $x^2$ + 4
(ii) $4-x^{-1}$
(iii) $2x^2$ - $\frac{2}{x}$

• A. i, ii, iii
• B. i
• C. ii, iii
• D. iii

Answer 1

The correct option is B

i

Polynomials cannot have variables with exponents as negative integers. So, (ii) and (iii) are not polynomials as the variable 'x' has negative exponents.