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chillimath

1. Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer.

(i) \(4x^2-3x+7\)           

(ii) \(y^2+\sqrt 2\)       

(iii) \(3\sqrt t+t\sqrt 2\)         

(iv) \(y+{2\over y}\)