## EXERCISE 2.1 1. Which of the following expressions are polynomials in one variable and which are not? State reasons for your answe

Question

EXERCISE 2.1

1. Which of the following expressions are polynomials in one variable and which are

not? State reasons for your answer.

2

(1) 4×2-3x + 7 (i) y2 + 2 (ii3V1

(iv) y +

у

(v) xlº + y + 50

a) 3ve +tV2 (iv) y+}

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2021-08-13T18:22:32+00:00
2021-08-13T18:22:32+00:00 2 Answers
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## Answers ( )

Answer:your answer us given in test book so see the test book

Question:-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 + √2

(iii) 3 √t + t√2

(iv) y+ 2/y

(v) x^10+ y^3+t^50Answer:-(i) We have 4x^2 – 3x + 7 = 4x^2 – 3x + 7x^0

It is a polynomial in one variable i.e., x

because each exponent of x is a whole number.

(ii) We have y^2 + √2 = y^2 + √2y^0

It is a polynomial in one variable i.e., y

because each exponent of y is a whole number.(iii) We have 3 √t + t√2 = 3 √t^1/2 + √2.t

It is not a polynomial, because one of the exponents of t is 1/2,

which is not a whole number.

(iv) We have y + y+2/y = y + 2.y^-1

It is not a polynomial, because one of the exponents of y is -1,

which is not a whole number.(v) We have x^10+ y^3 + t^50

Here, exponent of every variable is a whole number, but x^10 + y^3 + t^50 is a polynomial in x, y and t, i.e., in three variables.

So, it is not a polynomial in one variable.Plz mrk as brainliest ❤