#themathsgurudev , EX2.1class 9 NCERT, class 9 EX2.1NCERT, NCERT EX2.1 CLASS 9,polynoimals class9

#themathsgurudev , EX2.1class 9 NCERT, class 9 EX2.1NCERT, NCERT EX2.1 CLASS 9,polynoimals class9
Q1. Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer.
(i) 4x²–3x+7 (ii)y^2+root2 (iii)3t^1/2- t2^1/2 (iv)y+1/y (v)x^10+y^3+t^30,
Q2. Write the coefficients of x² in each of the following:
(i)2 + x² + x (ii) 2 – x² + x³ (iii)pi/2 x^2+x (iv)root 2-1,
Q3. Give one example each of a binomial of degree 35, and of a monomial of degree 100,
Q4. Write the degree of each of the following polynomials:
(i)5x³ + 4x² + 7x (ii) 4 – y² (iii) 5t –root7 (iv)3 ,
Q5. Classify the following as linear, quadratic and cubic polynomials:
(i) x² + x (ii) x – x³ (iii) y + y² + 4 (iv) 1 + x (v) 3t (vi) r² (vii) 7x³