Solve Physics TMH numericals class 9th chapter 2 question no 11 ,12 and 13
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Question 1:
Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer.
(i) (ii) (iii)
(iv) (v)
ANSWER:
(i)
Yes, this expression is a polynomial in one variable x.
(ii)
Yes, this expression is a polynomial in one variable y.
(iii)
No. It can be observed that the exponent of variable t in term is , which is not a whole number. Therefore, this expression is not a polynomial.
(iv)
No. It can be observed that the exponent of variable y in termis −1, which is not a whole number. Therefore, this expression is not a polynomial.
(v)
No. It can be observed that this expression is a polynomial in 3 variables x, y, and t. Therefore, it is not a polynomial in one variable.