Question

How to solve sum no 1?? From the attachment???

Answer 1

Polynomials are expressions in which the all the variables have a whole number as their exponent.

• The power of variables is always a whole number in a polynomial.

$E.g. = 2xy+5, 3x^{2}+2x, etc.$

The above two examples are polynomials as the variables(x and y) have a whole number (0, 1, 2, 3, ...) as their exponent (power).

$\frac{8}{x} +3y$

Power of x is -1; ($x^{-1}$). -1 is not a whole number. So, this is not a polynomial.

(Note that 1/x = $x^{-1}$)

So, you can easily identify which of the given expressions are polynomials or not. You can solve the exercise yourself and check the answers.

ANSWERS :-

Q1

(a) It is a polynomial.

(b) It is not a polynomial.

(c) It is a polynomial.

(d) It is not a polynomial.

(e) It is not a polynomial.

(f) It is not a polynomial.

(g) It is a polynomial.

(h) It is a polynomial.

(i) It is a polynomial.

(j) It is not a polynomial.