which are the following expressions are polynomials in one varibable and which are not? state reasons for answer. 1) 4x² - 3x + 7
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(i) In 4x2−3x+7. all the indies of x are whole numbers. So, it is a polynomial in one variable x.
(ii) In y2+2 the index of y is a whole number. So, it is a polynomial in one variable y.
(iii) In 3t+t2=3t21+2 t, here the exponent of first term is 21, which is not whole number therefore is it not a polynomial.
(iv) In y+y2=y+2y−1, here the exponent of first term is −1, which is not whole number, therefore, is it not a polynomial.
(v) In x10+y3+t50 is not a polynomial in one variable as three variable x,y and t occur in it.
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